On this page, example assignments from 2014 of Stellenbosch University's Mechanical Engineering department will be set up using Patran and solved using MSC Nastran.
For complicated geometry cleanup and preparation, MSC Apex may be used. The assignments were prepared by Dr Martin Venter from Stellenbosch University's Mechanical Engineering department. The videos on this page will focus on the use of the respective software packages and not on answering all the assignment questions. Students should be able to follow the videos and then use the software to set up and solve similar problems and use the tools provided to answer the relevant questions. The videos on this page were created by Paul Naudé from ESTEQ with the sole purpose of aiding students in using the relevant software products from MSC Software when completing the assignments. Please use your own discretion and engineering judgement when following the steps provided.
I.Download and installed MSC Nastran (it includes Patran), which will be used for all the assignments from MSC Software
Accept most of the default options during the installation and
When asked for the various CAD licence files, leave it blank to skip unless you happen to have any of the referenced CAD packages licensed on your computer (this is not required; it is only for directly importing from those CAD formats)
NB: When picking a start-in folder, make sure NONE of the folder names contain any spaces! E.g. DO NOT choose any folder such as "C:\My Documents" due to the space in the folder name. Nastran WILL NOT run if your model is saved there. Underscores and the minus signs are accepted, though, such as "C:\My_FEA-Projects"
After installing MSC Nastran, these two shortcuts should be available on your desktop:
MSC Nastran (the solver) will be used to analyse the problems, and Patran (the user interface) will be used to build the models and view the results from Nastran
II. For a view of the future, or if you do not have access to a CAD package, or need to prepare complicated geometry for analysis, such as mid-surfacing and CAD clean-up, also download and install MSC Apex.
To get started using MSC Apex, follow the tips and tricks here
MSC Apex is a next-generation CAE tool with currently very strong CAD clean-up capabilities and some basic FEA setup and solving capabilities
Geometry creation is 4 times quicker (and easier) in MSC Apex than in Patran (see Assignment 2 Question 2).
III.To help you better understand the FEA process flow and where in the Patran user-interface to find the associated tools, I recommend downloading this file:
2. Video: Getting started using Patran and MSC Nastran
https://youtu.be/0_bJS4rUqJY?rel=0
Questions you must be able to answer now after watching the above video:
What common keyboard characters are NOT allowed in any file name when using Nastran?
How do you nicely fit the model window inside the Patran interface?
What is the importance of the value you have to type in when starting a new model?
What is common to both the Patran tab order and the FEA process shown in the previous flowchart?
How do you manipulate what functions you have available on the right side of the model in the Patran user interface?
What effect does the order in which you choose items in the 3 drop-down menus on the right side have?
Which button always needs to be clicked for any data entered to become active or used in a Patran model?
What do the three dots (...) after the text on some buttons signify?
What does clicking on an icon in the top menu do to the right-side form dropdown boxes?
Not all the Patran functions are represented by icons. How do you get access to the rest?
Where do you change the setting for whether only fully enclosed entities or also partially enclosed entities are selected when selecting by dragging a rectangle over multiple entities?
Where are the model name and the active group name displayed in Patran?
3. Patran and Nastran MUST KNOW Tips and Tricks
I. The Patran & Nastran files created and exchanged
https://youtu.be/Ymxt8xkwjQg?rel=0
II. NO Spaces allowed
https://youtu.be/eZh38ZmbM2E?rel=0
III. Geometry Importing Units and Units in general
https://youtu.be/8cUGGvg0sXk?rel=0
IV. Global Model Tolerance
https://youtu.be/Lo_5KTYmyvo?rel=0
V. ONE Undo, BUT Unlimited undos if you know how
https://youtu.be/KAfWAz52YoQ?rel=0
VI. Unimportant but useful: Using a model template
"Error executing subprogram (errno) = 2" Video: What this error means and how to fix the problem
This error occurs when Nastran is not installed in the default location or when a newer version of Patran is installed than Patran. This error can, however, easily be corrected by following the steps in this video. (Advanced users can simply edit the P3_TRANS.INI file in the Patran install folder directly to reflect the correct path to the installed Nastran executable file.)
Don't ever risk your career by using cracked software!
THE EXCUSES: I only used it for my studies, I only wanted to evaluate the software, I didn't use if for commercial purposes, I only installed it, but never used it... Unfortunately, no reason holds up in court for the possession of stolen goods.
THE FINE? The full commercial purchase price of the software (for everything you had access to, whether or not it was even used!)
Students (under- or post-graduate) also has no recourse since they can get access to free legal student versions, or the full commercial versions through their respective universities. If you wish to evaluate any software or module that you do not have access to, please contact us, we will gladly arrange for evaluation licenses, even emergency licenses.
There is just no reason to access illegal software.
