| Name | pyNastran JSON |
| Version |
1.4.1
JSON |
| download |
| home_page | None |
| Summary | Nastran BDF/F06/OP2/OP4 File reader/editor/writer/viewer |
| upload_time | 2024-03-26 01:33:47 |
| maintainer | None |
| docs_url | None |
| author | Steve Doyle |
| requires_python | >=3.9 |
| license | Copyright (c) 2011-2024 Steven Doyle. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: a. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. b. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. c. Neither the name of the pyNastran developers nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| keywords |
nastran
|
| VCS |
 |
| bugtrack_url |
|
| requirements |
No requirements were recorded.
|
| Travis-CI |
No Travis.
|
| coveralls test coverage |
|
Main/dev:
[](http://pynastran-git.readthedocs.io/en/latest/?badge=latest)
[](https://github.com/SteveDoyle2/pyNastran/actions?query=workflow%3ACI+branch%3Amaster)
[](https://codecov.io/gh/SteveDoyle2/pyNastran)
See the [Installation Instructions](https://pynastran-git.readthedocs.io/en/1.4/installation/installation.html#installation-from-release)
for instructions on installing pyNastran.
<!---
[](https://discord.gg/s8RfSkZDHA)
.. |DiscourseBadge| image:: https://img.shields.io/badge/help_forum-discourse-blue.svg
.. _DiscourseBadge: https://discourse.matplotlib.org
--->
### v1.4.0
[Download GUI](https://sourceforge.net/projects/pynastran/files/?source=navbar) (latest is from 2024/2/29)
Also, check out the:
* [](https://pypi.python.org/pypi/pyNastran)
* [Discussion forum](http://groups.google.com/group/pynastran-discuss) (intended for questions about the latest release)
* [Developer forum](http://groups.google.com/group/pynastran-dev) (intended for questions about the main branch)
* [Docs](https://pynastran-git.readthedocs.io/en/1.4/)
* [Code of Conduct](https://github.com/SteveDoyle2/pyNastran/blob/main/code_of_conduct.md)
* [Contributing](https://github.com/SteveDoyle2/pyNastran/blob/main/contributing.rst)
for more detailed information.
### Blogs
* [Flutter Analysis in pyNastran](https://www.m4-engineering.com/flutter-analysis-with-pynastran/)
### Code of Conduct
Everyone interacting in the setuptools project’s codebase, issue trackers, chat room/Discord, and mailing lists is expected to follow the [Code of Conduct](https://github.com/SteveDoyle2/pyNastran/blob/main/code_of_conduct.md).
<!---
[](https://ci.appveyor.com/project/SteveDoyle2/pynastran)
[](https://codecov.io/gh/SteveDoyle2/pyNastran)
[](https://coveralls.io/github/SteveDoyle2/pyNastran?branch=main)
--->
<!---
<!---
[](https://ci.appveyor.com/project/SteveDoyle2/pynastran/branch/main)
[](https://ci.appveyor.com/project/SteveDoyle2/pynastran)
[](https://travis-ci.org/SteveDoyle2/pyNastran)
[](https://coveralls.io/github/SteveDoyle2/pyNastran?branch=main)
[](https://requires.io/github/SteveDoyle2/pyNastran/requirements/?branch=main) |
--->
# Overview
pyNastran is an interface library to the various Nastran file formats (BDF, OP2, OP4).
Using the BDF interface, you can read/edit/write Nastran geometry without worrying about
field formatting. Many checks are also performed to verify that your model is correct.
Using the OP2 interface, you can read large result files quickly and efficiently.
Additionally, you can also extract a subset of the result data and write OP2/F06 result
files. For a more detailed list of features, see:
* [Features](https://pynastran-git.readthedocs.io/en/1.4/quick_start/features.html#overview)
Using the pyNastran GUI, you can read in Nastran models and quickly view results for a model.
While it's no FEMAP/Patran, it can replace many tasks that would otherwise require a
commercial program.
# News
<!---
I yet again went down a bit of rabbit hole to improve the speed of the BDF,
but this time I'm much happier with the results. Still, getting back to parity
takes a lot of time and it's not quite there. It does simplify MSC HDF5
integration, so once I've added methods for updating more complicated objects
(e.g., PBARL, PCOMP, RBE3), HDF5 will be next. If you want to test it out,
it's not included with the official release, but is found in
``pyNastran.dev.bdf_vectorized3``, so not my first attempt :)
This should be hidden...
--->
### v1.4.1 has been released (2024/3/25)
This is a mainly a bug fix release. There's also a couple of new acoustic cards and MSC's STRESSA table that were added to fix some errors.
The force/bending moment diagrams have also been improved:
- Loads popup
- Visuals to indicate the location of the cutting planes
- Element ids may also be explicitly limited now
- You can pick the plot x-axis (global x/y/z vs. distance)
See pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.4.1) for details on the other changes.
### v1.4.0 has been released (2024/2/29)
It's been a while since the update, but I've had a more time lately. MSC also provided a copy of MSC Nastran free of charge to help support the project, so modern MSC Nastran support is much better.
Finally, the GUI has received a lot of work recently including:
- Better results selector. Individual [displacment](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#real-displacement-results) and [SPC/MPC/Load Vector](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#real-spc-forces-load-vectorresults/) components are selectable.
For [solid](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#solid-stress-strain/), [plate](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#plate-stress-strain/), and [composite stress/strain](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#composite-plate-stress-strain/), nodal or centroidal stress
may be shown and various blending methods including nodal averaging is now supported.
- [Grid Point Forces](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#shear-moment-torque-plot/)
are supported in the GUI. They take some getting used to but you can march along a vector and output the section loads in any arbitrary coordinate system.
- [Preferences](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#preferences/) are also now exposed in a json file (vs the registry) and if you find
a bug in the new results, you can flip a flag to use the old objects.
- A recent files history to speed up model loading and a whole bunch of other bug fixes.
Programmatics:
- Supports Python 3.9 - 3.12 (later versions of Python requires downloading from github)
- GUI is compatible with VTK 9 and PyQt5/PySide2
- improved testing of old versions of packages
- much improve NX 64-bit and OptiStruct support
BDF:
- fixed CAERO1 paneling bug
- 427 cards supported (up from 405)
OP2:
- 20 new results
- vectorized op2 writing
- ``model.cquad4_stress`` is now found in ``model.op2_results.stress.cquad4_stress``. Same goes for other stress, strain, force, and strain_energy components. This will hopefully make things a bit easier find.
GUI:
- grid point forces / section cuts / shear-moment torque plotter
- more dynamic stress/strain results allow for simpler menus
- transient/complex fringe only animations now supported
- recent files support
- greatly expanded preferences menu; many more preferences are saved
- new icons
See pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.4.0) for details on the other changes.
### v1.3.4 has been released (2022/5/30)
This is a bug fix release mainly to address dependency changes:
Programmatics:
- supports Python 3.7-3.10
- support for nptyping 1.1.1-2.0 (removed as a required dependency)
- support for h5py >3.0
- GUI is compatible with PyQt5/6 and PySide2/6 and VTK 7-9
There are also at least 33 bugs fixed and a few features added from the 1.4 release (e.g., pathlib support, subcase limiting in the flutter F06 parser).
See pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.3.4) for details on the other changes.
### v1.3.3 (2020/6/28)
This is a bug fix only release outside of:
```python
>>> subcase.add_set_from_values(set_id, values)
```
which was overly complicated to do before.
Programmatics:
- Supports Python 3.7 and 3.8
- GUI is compatible with PyQt5 and PySide2 and VTK 7-9
- improved testing of old versions of packages
- updated nptyping requirements
- support for NX 2019.0, 2019.1
See pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.3.3) for details on the 54 bug fixes. Not too bad for 2.5 months!
### pyNastran v1.3.2 has been released (2020/4/8)
With Python 2 now officially dead, it's time for a new killer feature to get the last few people to switch.
There is now support for writing OP2 files! They're difficult to create from scratch,
but modifying an existing one isn't difficult. This includes geometry support.
In addition, many new OP2 results have been added. Modern NX Nastran should work much better.
Programmatics:
- Supports Python 3.7 and 3.8
- Dropping Python 2.7 and 3.6 support
- GUI is compatible with PyQt5 and PySide2
- improved testing of old versions of packages
BDF:
- enhancements
- 405 cards supported (up from 373)
- improved mesh utilities
- bdf mirror, bdf convert, bdf export_caero_mesh
- additional `bdf scale`, which takes arbitrary mass, length, time, pressure, or velocity scale factors (3 of 5) to apply a scaling law
- added deck guessing with punch=None
OP2:
- enhancements:
- OP2 write support
- fixed most pandas deprecation warnings/added support for pandas 0.25
- much improved NX 2019.2 support
- minor enhancements:
- more hdf5 results
- a few more cards supported in the OP2 geometry reader
- preliminary NX 64-bit support
- more MSC versions supported
- sped up R1TABRG (optimization) reading
- various geometry cards added
- supports more PARAM reading
- new results:
- composite failure indices (OEFIT)
- sensitivity support (DSCMCOL)
- Cambpell diagrams (CDDATA)
- eigenvectors (BOPHIGF)
- grid point forces SORT2 (OGPFB2)
- stress/strain/force
- random stress/strain (OESVM1/2, OESVM1C, OSTRVM1/2, OSTRVM2, OESXRM1C, OESXNO1, OESXNO1C)
- real/complex stress/strain/force output for centroidal CQUADR/CTRIAR
- complex CBEAR forces
- real CFAST, CWELD forces
- nonlinear cbush stress/strain/force
- other
- PSDs
- optimization
- convergence table
- design variables
- weight, displacement, stress, strain, force, composite stress, composite strain, fractional mass response
- SOL 401/402 results:
- eigenvalue_fluid (LAMAF, LAMAS)
- eigenvectors (BOPHIGF, BOPHIGS)
- temperature (OTEMP1)
- solution set
- results: displacement, velocity, acceleration, eigenvectors:
- tables: OUXY1, OUXY2, OPHSA
GUI:
- enhancements:
- partial custom results many now be loaded
- animation now supports complex fringe
- result case description now shows the mode/time/frequency
- result case description now shows the min/max value as well as the location
- map centroidal to nodal option
- adding node/element highlight menu
- adding node/element mark/label menu
- result case description now shows the min/max value as well as the location
- result case description now shows the mode/time/frequency
- minor enhancements:
- added export result option to right-click menu
- more keyboard shortcuts
- nastran:
- geometry:
- added preferences for geometry/results to speed up model loading
- element & material coordinate systems
- results
- added acoustic displacements (OUG1F)
- real/complex stress/strain/force results
- plate by upper/lower, composite plates by ply, bars, rods, springs, cbush, cdamp
- fractional mass response
F06:
- KE support for plot_145
Many bug fixes, and a few more details on features, can be found in the 
### v1.3.1/v1.3.0 (2020/4/8)
This result has been superseded by 1.3.2. The PyPi page was fixed.
### v1.2.1 (2019/5/24)
I keep saying to myself there's not much to add, but Nastran is huge. Beyond HDF5
support in the BDF, I'm a huge fan of the new ability to keep track of which include file a
card came from and write it as a separate file. It's limited in usefulness, but very handy
in certain cases. There's a new (still preliminary) superelement capability. I'm far
from a superelement expert, but it's probably useful.
The OP2 reader now supports SORT2 along with much improved random results reading.
If you're using 60+ GB OP2s, you probably have had issues with RAM usage in the past.
With the new ability to dump the OP2 directly to HDF5, this should not be an as much of
an issue. It's not 100% implemented, so let me know if you need it for another result.
Regarding the GUI, there are also some new features. Groups work a bit better, but aren't
quite perfect. Logging has been dramatically sped up, so the GUI loads faster, and you can
load Nastran models even faster if you disable additional results (e.g., element quality).
Finally, Python 2.7 is end of life. Numpy, scipy, and matplotlib have all dropped
Python 2.7 support. It's time for pyNastran to as well. The OP2 reader is 30% faster in
Python 3.6+ than Python 2.7, so it's not all bad!
Programmatics:
- This is the last Python 2.7 release.
- Dropping Python 3.5 support
- Supports Python 2.7, 3.6-3.7
- GUI is compatible with PyQt4/PyQt5 as well as PySide/PySide2
- improved testing of old versions of packages
BDF:
- 373 cards supported (up from 343)
- added abiltity to write models to separate include files
```python
>>> model = BDF()
>>> model.read_bdf(bdf_filename, save_file_structure=True)
out_filenames = {
bdf_filename : bdf_filename_new,
include_filename : include_filename_new,
}
>>> model.write_bdfs(out_filenames, relative_dirname=None, is_windows=None)
>>> ifile = model.grids[1].ifile
```
- HDF5 import/export
```python
>>> model = read_bdf(bdf_filename)
>>> model.export_hdf5_filename(hdf5_filename)
>>> model_new = OP2()
>>> model_new.load_hdf5_filename(hdf5_filename)
```
- preliminary superelement support
```python
>>> model.read_bdf(bdf_filename)
>>> model.superelement_models[1].nodes
```
OP2:
- reorganization of random op2 results into op2.results.psd (or ato, no, crm, rms) to aid in finding data
- reorganization of op2 class to reduce number of functions in the object. This affects any custom table reading.
- improved optimization response reading
- limited SORT2 support
- fixed CD transformation bug for BOUGV1 and BOPHIG1 tables
- Improved HDF5 export/import support (e.g., matrices, random results)
- Can optionally save directly to HDF5 instead of numpy (limited).
- Loading OP2s to an HDF5 file to decrease memory usage
```python
>>> op2_model = OP2()
>>> op2_model.load_as_h5 = True
>>> op2_model.read_op2(op2_filename)
```
OP2Geom:
- HDF5 support
- reading EQEXIN/S, GPT, GPDT, CSTM/S tables (recovery of nodes & coordinate with OP2Geom)
- fixed theta/mcid reading for CTRIA3/CQUAD4
- fixed CQUAD8 bug
GUI:
- sped up HTML logging
- much improved groups menu
- options for Nastran in preferences menu to speed up loading/limit memory usage
- pyNastran BDF pickle reading
- pyNastran OP2 HDF5 reading (not MSC's format)
- visualization when picking nodes/elements
- min/max labels
- highlight menu
- Patran-style colors
- custom force vectors
- AVL support
Known issues:
- Transient Pandas Dataframes will fail for newer versions of numpy/pandas.
### v1.2.0 (2019/5/21)
This result has been superseded by 1.2.1. See release notes for details.
### v1.1.0 (2018/6/26)
See [v1.1.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v1.1.0) for information regarding enhancements.
### v1.0.0 (2017/5/25)
See [v1.0.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v1.0.0) for information regarding enhancements.
### v0.8.0 (2016/8/21)
See [v0.8.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v0.8.0) for information regarding enhancements.
### v0.7.2 (2015/4/25)
See [v0.7.2](https://github.com/SteveDoyle2/pyNastran/releases) for information regarding enhancements.
### Version 0.6.1 has been released (2013/6)
**Version 0.6** improves BDF reading. The reader is more robust and also requires proper BDF field formatting (e.g. an integer field can't be a float). Additionally, cards also have a comment() method.
Marcin Gąsiorek participated in the latest pyNastran under the European Space Agency's (ESA) "Summer of Code In Space" [SOCIS](http://sophia.estec.esa.int/socis2012/?q=node/13) program. The program provides a stipend to students to work on open-source projects.
He did a great job of simplifying code and creating nicer documentation.
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"description": "\r\nMain/dev:\r\n[](http://pynastran-git.readthedocs.io/en/latest/?badge=latest)\r\n[](https://github.com/SteveDoyle2/pyNastran/actions?query=workflow%3ACI+branch%3Amaster)\r\n[](https://codecov.io/gh/SteveDoyle2/pyNastran)\r\n\r\nSee the [Installation Instructions](https://pynastran-git.readthedocs.io/en/1.4/installation/installation.html#installation-from-release)\r\nfor instructions on installing pyNastran.\r\n\r\n\r\n<!---\r\n\r\n[](https://discord.gg/s8RfSkZDHA)\r\n\r\n\r\n.. |DiscourseBadge| image:: https://img.shields.io/badge/help_forum-discourse-blue.svg\r\n.. _DiscourseBadge: https://discourse.matplotlib.org\r\n--->\r\n\r\n### v1.4.0\r\n\r\n[Download GUI](https://sourceforge.net/projects/pynastran/files/?source=navbar) (latest is from 2024/2/29)\r\n\r\nAlso, check out the:\r\n * [](https://pypi.python.org/pypi/pyNastran)\r\n * [Discussion forum](http://groups.google.com/group/pynastran-discuss) (intended for questions about the latest release)\r\n * [Developer forum](http://groups.google.com/group/pynastran-dev) (intended for questions about the main branch)\r\n * [Docs](https://pynastran-git.readthedocs.io/en/1.4/)\r\n * [Code of Conduct](https://github.com/SteveDoyle2/pyNastran/blob/main/code_of_conduct.md)\r\n * [Contributing](https://github.com/SteveDoyle2/pyNastran/blob/main/contributing.rst)\r\n\r\nfor more detailed information.\r\n\r\n### Blogs\r\n * [Flutter Analysis in pyNastran](https://www.m4-engineering.com/flutter-analysis-with-pynastran/)\r\n\r\n\r\n### Code of Conduct\r\n\r\nEveryone interacting in the setuptools project\u2019s codebase, issue trackers, chat room/Discord, and mailing lists is expected to follow the [Code of Conduct](https://github.com/SteveDoyle2/pyNastran/blob/main/code_of_conduct.md).\r\n\r\n\r\n<!---\r\n[](https://ci.appveyor.com/project/SteveDoyle2/pynastran)\r\n[](https://codecov.io/gh/SteveDoyle2/pyNastran)\r\n[](https://coveralls.io/github/SteveDoyle2/pyNastran?branch=main)\r\n--->\r\n<!---\r\n\r\n\r\n<!---\r\n[](https://ci.appveyor.com/project/SteveDoyle2/pynastran/branch/main)\r\n[](https://ci.appveyor.com/project/SteveDoyle2/pynastran)\r\n[](https://travis-ci.org/SteveDoyle2/pyNastran)\r\n[](https://coveralls.io/github/SteveDoyle2/pyNastran?branch=main)\r\n[](https://requires.io/github/SteveDoyle2/pyNastran/requirements/?branch=main)\t|\r\n--->\r\n\r\n# Overview\r\n\r\npyNastran is an interface library to the various Nastran file formats (BDF, OP2, OP4).\r\nUsing the BDF interface, you can read/edit/write Nastran geometry without worrying about\r\nfield formatting. Many checks are also performed to verify that your model is correct.\r\nUsing the OP2 interface, you can read large result files quickly and efficiently.\r\nAdditionally, you can also extract a subset of the result data and write OP2/F06 result\r\nfiles. For a more detailed list of features, see:\r\n * [Features](https://pynastran-git.readthedocs.io/en/1.4/quick_start/features.html#overview)\r\n\r\nUsing the pyNastran GUI, you can read in Nastran models and quickly view results for a model.\r\nWhile it's no FEMAP/Patran, it can replace many tasks that would otherwise require a\r\ncommercial program.\r\n\r\n\r\n\r\n\r\n# News\r\n\r\n<!---\r\n\r\nI yet again went down a bit of rabbit hole to improve the speed of the BDF, \r\nbut this time I'm much happier with the results. Still, getting back to parity\r\ntakes a lot of time and it's not quite there. It does simplify MSC HDF5 \r\nintegration, so once I've added methods for updating more complicated objects\r\n(e.g., PBARL, PCOMP, RBE3), HDF5 will be next. If you want to test it out, \r\nit's not included with the official release, but is found in \r\n``pyNastran.dev.bdf_vectorized3``, so not my first attempt :)\r\n\r\nThis should be hidden...\r\n--->\r\n\r\n### v1.4.1 has been released (2024/3/25)\r\n\r\nThis is a mainly a bug fix release. There's also a couple of new acoustic cards and MSC's STRESSA table that were added to fix some errors.\r\n\r\nThe force/bending moment diagrams have also been improved:\r\n - Loads popup\r\n - Visuals to indicate the location of the cutting planes\r\n - Element ids may also be explicitly limited now\r\n - You can pick the plot x-axis (global x/y/z vs. distance)\r\n\r\nSee pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.4.1) for details on the other changes.\r\n\r\n### v1.4.0 has been released (2024/2/29)\r\n\r\nIt's been a while since the update, but I've had a more time lately. MSC also provided a copy of MSC Nastran free of charge to help support the project, so modern MSC Nastran support is much better.\r\n\r\nFinally, the GUI has received a lot of work recently including:\r\n - Better results selector. Individual [displacment](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#real-displacement-results) and [SPC/MPC/Load Vector](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#real-spc-forces-load-vectorresults/) components are selectable.\r\n For [solid](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#solid-stress-strain/), [plate](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#plate-stress-strain/), and [composite stress/strain](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#composite-plate-stress-strain/), nodal or centroidal stress \r\n may be shown and various blending methods including nodal averaging is now supported.\r\n - [Grid Point Forces](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#shear-moment-torque-plot/)\r\n are supported in the GUI. They take some getting used to but you can march along a vector and output the section loads in any arbitrary coordinate system.\r\n - [Preferences](https://pynastran-git.readthedocs.io/en/1.4/quick_start/gui.html#preferences/) are also now exposed in a json file (vs the registry) and if you find\r\n a bug in the new results, you can flip a flag to use the old objects.\r\n - A recent files history to speed up model loading and a whole bunch of other bug fixes.\r\n\r\nProgrammatics:\r\n - Supports Python 3.9 - 3.12 (later versions of Python requires downloading from github)\r\n - GUI is compatible with VTK 9 and PyQt5/PySide2\r\n - improved testing of old versions of packages\r\n - much improve NX 64-bit and OptiStruct support\r\n\r\nBDF:\r\n - fixed CAERO1 paneling bug\r\n - 427 cards supported (up from 405)\r\n\r\nOP2:\r\n - 20 new results\r\n - vectorized op2 writing\r\n - ``model.cquad4_stress`` is now found in ``model.op2_results.stress.cquad4_stress``. Same goes for other stress, strain, force, and strain_energy components. This will hopefully make things a bit easier find.\r\n\r\nGUI:\r\n - grid point forces / section cuts / shear-moment torque plotter\r\n - more dynamic stress/strain results allow for simpler menus\r\n - transient/complex fringe only animations now supported\r\n - recent files support\r\n - greatly expanded preferences menu; many more preferences are saved\r\n - new icons\r\n\r\n\r\nSee pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.4.0) for details on the other changes.\r\n\r\n\r\n### v1.3.4 has been released (2022/5/30)\r\nThis is a bug fix release mainly to address dependency changes:\r\n\r\nProgrammatics:\r\n - supports Python 3.7-3.10\r\n - support for nptyping 1.1.1-2.0 (removed as a required dependency)\r\n - support for h5py >3.0\r\n - GUI is compatible with PyQt5/6 and PySide2/6 and VTK 7-9\r\n\r\nThere are also at least 33 bugs fixed and a few features added from the 1.4 release (e.g., pathlib support, subcase limiting in the flutter F06 parser).\r\n\r\nSee pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.3.4) for details on the other changes.\r\n\r\n\r\n### v1.3.3 (2020/6/28)\r\n\r\nThis is a bug fix only release outside of:\r\n ```python\r\n >>> subcase.add_set_from_values(set_id, values)\r\n ```\r\n\r\nwhich was overly complicated to do before.\r\n\r\nProgrammatics:\r\n - Supports Python 3.7 and 3.8\r\n - GUI is compatible with PyQt5 and PySide2 and VTK 7-9\r\n - improved testing of old versions of packages\r\n - updated nptyping requirements\r\n - support for NX 2019.0, 2019.1\r\n\r\nSee pyNastran [release notes](https://github.com/SteveDoyle2/pyNastran/releases/tag/1.3.3) for details on the 54 bug fixes. Not too bad for 2.5 months!\r\n\r\n\r\n### pyNastran v1.3.2 has been released (2020/4/8)\r\n\r\nWith Python 2 now officially dead, it's time for a new killer feature to get the last few people to switch.\r\n\r\nThere is now support for writing OP2 files! They're difficult to create from scratch,\r\nbut modifying an existing one isn't difficult. This includes geometry support.\r\n\r\nIn addition, many new OP2 results have been added. Modern NX Nastran should work much better.\r\n\r\nProgrammatics:\r\n - Supports Python 3.7 and 3.8\r\n - Dropping Python 2.7 and 3.6 support\r\n - GUI is compatible with PyQt5 and PySide2\r\n - improved testing of old versions of packages\r\n\r\nBDF:\r\n - enhancements\r\n - 405 cards supported (up from 373)\r\n - improved mesh utilities\r\n - bdf mirror, bdf convert, bdf export_caero_mesh\r\n - additional `bdf scale`, which takes arbitrary mass, length, time, pressure, or velocity scale factors (3 of 5) to apply a scaling law\r\n - added deck guessing with punch=None\r\n\r\nOP2:\r\n - enhancements:\r\n - OP2 write support\r\n - fixed most pandas deprecation warnings/added support for pandas 0.25\r\n - much improved NX 2019.2 support\r\n - minor enhancements:\r\n - more hdf5 results\r\n - a few more cards supported in the OP2 geometry reader\r\n - preliminary NX 64-bit support\r\n - more MSC versions supported\r\n - sped up R1TABRG (optimization) reading\r\n - various geometry cards added\r\n - supports more PARAM reading\r\n - new results:\r\n - composite failure indices (OEFIT)\r\n - sensitivity support (DSCMCOL)\r\n - Cambpell diagrams (CDDATA)\r\n - eigenvectors (BOPHIGF)\r\n - grid point forces SORT2 (OGPFB2)\r\n - stress/strain/force\r\n - random stress/strain (OESVM1/2, OESVM1C, OSTRVM1/2, OSTRVM2, OESXRM1C, OESXNO1, OESXNO1C)\r\n - real/complex stress/strain/force output for centroidal CQUADR/CTRIAR\r\n - complex CBEAR forces\r\n - real CFAST, CWELD forces\r\n - nonlinear cbush stress/strain/force\r\n - other\r\n - PSDs\r\n - optimization\r\n - convergence table\r\n - design variables\r\n - weight, displacement, stress, strain, force, composite stress, composite strain, fractional mass response\r\n - SOL 401/402 results:\r\n - eigenvalue_fluid (LAMAF, LAMAS)\r\n - eigenvectors (BOPHIGF, BOPHIGS)\r\n - temperature (OTEMP1)\r\n - solution set\r\n - results: displacement, velocity, acceleration, eigenvectors:\r\n - tables: OUXY1, OUXY2, OPHSA\r\n\r\nGUI:\r\n - enhancements:\r\n - partial custom results many now be loaded\r\n - animation now supports complex fringe\r\n - result case description now shows the mode/time/frequency\r\n - result case description now shows the min/max value as well as the location\r\n - map centroidal to nodal option\r\n - adding node/element highlight menu\r\n - adding node/element mark/label menu\r\n - result case description now shows the min/max value as well as the location\r\n - result case description now shows the mode/time/frequency\r\n - minor enhancements:\r\n - added export result option to right-click menu\r\n - more keyboard shortcuts\r\n - nastran:\r\n - geometry:\r\n - added preferences for geometry/results to speed up model loading\r\n - element & material coordinate systems\r\n - results\r\n - added acoustic displacements (OUG1F)\r\n - real/complex stress/strain/force results\r\n - plate by upper/lower, composite plates by ply, bars, rods, springs, cbush, cdamp\r\n - fractional mass response\r\n\r\nF06:\r\n - KE support for plot_145\r\n\r\nMany bug fixes, and a few more details on features, can be found in the \r\n\r\n### v1.3.1/v1.3.0 (2020/4/8)\r\n\r\nThis result has been superseded by 1.3.2. The PyPi page was fixed.\r\n\r\n### v1.2.1 (2019/5/24)\r\n\r\nI keep saying to myself there's not much to add, but Nastran is huge. Beyond HDF5\r\nsupport in the BDF, I'm a huge fan of the new ability to keep track of which include file a\r\ncard came from and write it as a separate file. It's limited in usefulness, but very handy\r\nin certain cases. There's a new (still preliminary) superelement capability. I'm far\r\nfrom a superelement expert, but it's probably useful.\r\n\r\nThe OP2 reader now supports SORT2 along with much improved random results reading.\r\nIf you're using 60+ GB OP2s, you probably have had issues with RAM usage in the past.\r\nWith the new ability to dump the OP2 directly to HDF5, this should not be an as much of\r\nan issue. It's not 100% implemented, so let me know if you need it for another result.\r\n\r\nRegarding the GUI, there are also some new features. Groups work a bit better, but aren't\r\nquite perfect. Logging has been dramatically sped up, so the GUI loads faster, and you can\r\nload Nastran models even faster if you disable additional results (e.g., element quality).\r\n\r\nFinally, Python 2.7 is end of life. Numpy, scipy, and matplotlib have all dropped\r\nPython 2.7 support. It's time for pyNastran to as well. The OP2 reader is 30% faster in\r\nPython 3.6+ than Python 2.7, so it's not all bad!\r\n\r\nProgrammatics:\r\n - This is the last Python 2.7 release.\r\n - Dropping Python 3.5 support\r\n - Supports Python 2.7, 3.6-3.7\r\n - GUI is compatible with PyQt4/PyQt5 as well as PySide/PySide2\r\n - improved testing of old versions of packages\r\n\r\nBDF:\r\n - 373 cards supported (up from 343)\r\n - added abiltity to write models to separate include files\r\n ```python\r\n >>> model = BDF()\r\n >>> model.read_bdf(bdf_filename, save_file_structure=True)\r\n\r\n out_filenames = {\r\n bdf_filename : bdf_filename_new,\r\n include_filename : include_filename_new,\r\n }\r\n >>> model.write_bdfs(out_filenames, relative_dirname=None, is_windows=None)\r\n >>> ifile = model.grids[1].ifile\r\n ```\r\n\r\n - HDF5 import/export\r\n ```python\r\n >>> model = read_bdf(bdf_filename)\r\n >>> model.export_hdf5_filename(hdf5_filename)\r\n >>> model_new = OP2()\r\n >>> model_new.load_hdf5_filename(hdf5_filename)\r\n ```\r\n\r\n - preliminary superelement support\r\n ```python\r\n >>> model.read_bdf(bdf_filename)\r\n >>> model.superelement_models[1].nodes\r\n ```\r\n\r\n\r\nOP2:\r\n - reorganization of random op2 results into op2.results.psd (or ato, no, crm, rms) to aid in finding data\r\n - reorganization of op2 class to reduce number of functions in the object. This affects any custom table reading.\r\n - improved optimization response reading\r\n - limited SORT2 support\r\n - fixed CD transformation bug for BOUGV1 and BOPHIG1 tables\r\n - Improved HDF5 export/import support (e.g., matrices, random results)\r\n\r\n - Can optionally save directly to HDF5 instead of numpy (limited).\r\n - Loading OP2s to an HDF5 file to decrease memory usage\r\n ```python\r\n >>> op2_model = OP2()\r\n >>> op2_model.load_as_h5 = True\r\n >>> op2_model.read_op2(op2_filename)\r\n ```\r\n\r\nOP2Geom:\r\n - HDF5 support\r\n - reading EQEXIN/S, GPT, GPDT, CSTM/S tables (recovery of nodes & coordinate with OP2Geom)\r\n - fixed theta/mcid reading for CTRIA3/CQUAD4\r\n - fixed CQUAD8 bug\r\n\r\nGUI:\r\n - sped up HTML logging\r\n - much improved groups menu\r\n - options for Nastran in preferences menu to speed up loading/limit memory usage\r\n - pyNastran BDF pickle reading\r\n - pyNastran OP2 HDF5 reading (not MSC's format)\r\n - visualization when picking nodes/elements\r\n - min/max labels\r\n - highlight menu\r\n - Patran-style colors\r\n - custom force vectors\r\n - AVL support\r\n\r\nKnown issues:\r\n - Transient Pandas Dataframes will fail for newer versions of numpy/pandas.\r\n\r\n### v1.2.0 (2019/5/21)\r\n\r\nThis result has been superseded by 1.2.1. See release notes for details.\r\n\r\n### v1.1.0 (2018/6/26)\r\n\r\nSee [v1.1.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v1.1.0) for information regarding enhancements.\r\n\r\n### v1.0.0 (2017/5/25)\r\n\r\nSee [v1.0.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v1.0.0) for information regarding enhancements.\r\n\r\n### v0.8.0 (2016/8/21)\r\n\r\nSee [v0.8.0](https://github.com/SteveDoyle2/pyNastran/releases/tag/v0.8.0) for information regarding enhancements.\r\n\r\n### v0.7.2 (2015/4/25)\r\n\r\nSee [v0.7.2](https://github.com/SteveDoyle2/pyNastran/releases) for information regarding enhancements.\r\n\r\n### Version 0.6.1 has been released (2013/6)\r\n**Version 0.6** improves BDF reading. The reader is more robust and also requires proper BDF field formatting (e.g. an integer field can't be a float). Additionally, cards also have a comment() method.\r\n\r\nMarcin G\u0105siorek participated in the latest pyNastran under the European Space Agency's (ESA) \"Summer of Code In Space\" [SOCIS](http://sophia.estec.esa.int/socis2012/?q=node/13) program. The program provides a stipend to students to work on open-source projects.\r\nHe did a great job of simplifying code and creating nicer documentation.\r\n",
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"license": "Copyright (c) 2011-2024 Steven Doyle. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: a. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. b. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. c. Neither the name of the pyNastran developers nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ",
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