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Patran User’s Guide
 
Preface
 
 
 
 
 
 
 
 
 
About this Book
The Patran User’s Guide is a step-by-step introduction to using Patran. This guide is for designers, engineers, and analysts new to Patran. Understanding and using the information in this guide requires no prior experience with CAE or finite element analysis.
The purpose of the guide is to give you the essential information you need to immediately begin using Patran for real-life analysis projects. As you read it, keep in mind that there are many capabilities and methodologies not covered here. Once you have mastered the fundamentals of Patran, you will be ready to tackle the more advanced features and methods covered in other books
How the Book is Organized
The guide is organized into ten chapters. Chapters 1 and 2 present the fundamentals of Patran. Chapters 3 through 10 explain how to use Patran to complete the tasks in CAE projects.
Chapter 1
Introduction
Chapter 1 presents a brief overview of CAE and Patran. It also outlines the specific tasks in CAE projects.
Chapter 2
Fundamentals
The first part of this chapter covers the features and functions of Patran. The second part of the chapter introduces you to the graphical user interface and illustrates how to use various menus and tools.
Chapter 3
Creating and Maintaining a Database
Chapter 3 details how to create a model database. It goes on to cover three basic functions of a database: storing information, importing CAD data, and setting the parameters of a model.
Chapter 4
Turning Product Designs into Geometry
Patran provides its own set of tools for creating and editing geometry models. This chapter explains how you can use these tools to quickly create parts with two- and three-dimensional wireframe, surface, and solid geometry.
Chapter 5
Meshing and Creating Elements
Once the geometry model has been built, create and verify a finite element mesh using a powerful suite of meshing tools. Chapter 5 describes how to select and use the appropriate meshing tool.
Chapter 6
Defining Materials in the Model
With a meshed geometry model, you describe what your model is made of (such as steel or a composite) and the attributes of that material (stiffness, density, and so on). This chapter guides you through defining the materials.
Chapter 7
Applying Forces and Loads
Chapter 7 discusses how to apply environmental conditions to your model. The finite element analysis uses this information to test the model’s reaction to the applied loads when constrained by the applied boundary conditions.
Chapter 8
Generating Finite Elements
You must tailor the meshed geometry model to fit the formats and specifications of a selected analysis code and analysis type. Chapter 8 explains how you define element types (such as beam, shell, and so on) and element-related properties for your model.
Chapter 9
Running a Finite Element Analysis
This chapter details the link between the Patran modeling environment and the analysis solvers. It also provides instructions for setting up and submitting analysis cases.
Chapter 10
Visualizing Numerical Results
Chapter 10 explains how to use different tools to quickly visualize numerical results.
Beginning with Chapter 3, there are three sections to each chapter: an overview, a discussion on concepts, and instructions on using Patran menus and forms to carry out tasks.
Case Studies
To better illustrate the basic and more advanced capabilities of Patran, there are three case studies included in this Guide. Each case study looks at a unique analysis problem and steps through a solution sequence using Patran.
You may find it helpful simply to follow each case study from start to finish as you encounter them throughout this Guide. As an alternative, the overview chart below can help you link directly to a specific task you may want to see.
Case Study #1 - Annular plate located at the end of Chapter 1
This case study illustrates a complete start to finish analysis of an annular plate. A 2D membrane model is created in Patran to represent the plate’s 3D geometry and an MD Nastran linear static analysis of the plate under static pressure loading is carried out. Analysis results are compared to theoretical results.
 
To See How To:
Go To:
Model
Create Native Geometry in Patran
 
Mesh a 2D surface with Quad4 elements
 
Manually input isotropic material properties
 
Apply a constant edge load
Analysis
Set up a MD Nastran linear static analysis
 
Initiate a full analysis run
Results
Retrieve the analysis results
 
Create a quick plot of the results
 
 
 
Case Study #2 - Lug located at the end of Chapter 4
The 3D geometry of a steel lug is imported into Patran from a Parasolid CAD file. A 3D analysis model is then created with Patran. TetMesh is used to create 3D solid elements and the fields capability is illustrated by applying a load using a PCL function. A linear static MD Nastran analysis is performed and standard fringe and deformation plots are generated.
 
To See How To:
Go To:
Model
Import a CAD Model into Patran
 
Mesh a 3D Solid with Tet10 elements
 
Use Fields and PCL to define a load
Analysis
Run a linear static analysis using MD Nastran
Linear Static
Full Run
Results
Generate quick plots of the analysis results
 
 
 
Case Study #3 - Coffee Cup located at the end of Chapter 7
In this final case study, a complete analysis model is imported from a MD Nastran Input file. The first task is to view the existing boundary conditions and pressure loads. Then a change is made to the loading conditions and a MD Nastran analysis is repeated. Resulting fringe and deformation plots are viewed.
 
To See How To:
Go To:
Model
Import a MD Nastran Input file
 
View and modify pressure loads
Analysis
Run a linear static subcase in MD Nastran
Results
Produce quick plots of the analysis results
Other Books
Throughout this guide you will find references to other books where you may get additional information on a topic. If you do not have access to the book you need, you can locate it:
Online, by selecting Help from the Patran Main form. Then click on Document Library and select the book you would like to see.
In printed form, at the MSC Software BooksMart on the Web at www. engineering-e.com.
About MSC
MSC.Software Corporation is the largest single provider of finite element modeling and analysis (FEA) solutions to the computer-aided engineering (CAE) market. MSC’s products are marketed worldwide through offices in the United States, Europe, and Asia Pacific, and are available for use on systems ranging from PCs to workstations and supercomputers.
Technical Support
If you need help installing or using an MSC product, we encourage you first to refer to the technical documentation. If you need further assistance, please contact the technical support center nearest you. See Contacting Technical Support for contact information, and see Information for Technical Support for information that you should provide to support personnel.
We can assist you in using product features, checking code errors, program installation, and in choosing elements, materials, or procedures. We can give both general information on using the code and advice on specific analyses. If you have concerns about an analysis, we suggest that you contact us at an
early stage.
Technical Support on the World Wide Web
Brief description of the problem
You can also find a wide variety of support resources including application examples, technical application notes, available training courses, and documentation updates at the MSC Support, Training, and Documentation web page, www.mscsoftware.com/support. See MSC Web Site for more information.
Information for Technical Support
Please have the following information ready before calling customer support, or include it in your fax or e-mail. This information will help support personnel assist you efficiently.
Personal Information
System Information
First Contact:
Name
Phone number
E-mail address
Company name and address
Subsequent Contacts:
Personal identification number (PIN)
Manufacturer
(Sun, SGI, IBM, Digital UNIX, HP)
Model or chip (r10000 for SGI...)
OS Version (Solaris 2.5, IRIX 6, AIX...)
Graphics board (for graphics problems)
RAM (for hardware problems)
Available disk space (for hardware problems)
Product Information
 
Name of product you are using (Patran, MD Nastran, etc.)
Version number of the product
Contacting Technical Support
You can contact Support Services by telephone, fax, or e-mail.
 
Telephone and Fax:
United States
Patran Support
1-800-732-7284 
714-979-2990
Frimley, Camberley
Surrey, United Kingdom
 (+44) - 1276 - 67 1000
(+44) - 1276 - 69 1111
MD Nastran Support
 1-800-336-4858
323-259-4999
Tokyo, Japan
 81 - 3 - 3505 - 0266
81 - 3 - 3505 - 0914
Munich, Germany
 (+49) - 89 - 43 19 87 0
(+49) - 89 - 43 61 716
Paris, France
 (+33) - 1 - 69 36 69 36
(+33) - 1 - 69 36 45 17
Rome, Italy
 (+39) - 6 5 91 64 50
(+39) - 6 5 91 25 05
Gouda, The Netherlands
 (+31) - 182 - 543700
(+31) - 182 - 543707
Moscow, Russia
 (+7095) - 236 - 61 - 77
(+7095) - 232 - 3575
Madrid, Spain
 (+34) - 915 - 560919
(+34) - 915 - 567280
E-mail:
You can e-mail a detailed description of the problem to the e-mail address below that corresponds to the product you are using. You should receive an acknowledgment that your message was received, followed by an e-mail from one of our Technical Support Engineers.
Patran Support
MD Nastran Support
MSC.Institute Course Information
mscpatran.support@mscsoftware.com
mscnastran.support@mscsoftware.com
msctraining.support@mscsoftware.com
MSC Web Site
MSC.Software Corporation’s World Wide Web home page is at www.mscsoftware.com. At our Web site you can:
Get detailed information on MSC products and services, and industry-specific solutions.
Visit the MSC Bookstore.
Download product patches, utilities, and updates for all MSC products.
Get product-specific support information.
Review the most recent technical application notes.
Work through step by step exercises for a variety of engineering problems.
Obtain the MSC Institute of Technology schedule and course description.
MSC Institute of Technology
The MSC Institute of Technology provides basic and specialized training in the use of MSC’s MCAE software products, as well as in general analysis subjects such as thermal analysis, finite element modeling, and fatigue-life prediction. We offer the world’s largest selection of engineering analysis and design training courses, comprising more than 50 different courses. More than 5,000 engineers attend the MSC Institute annually.
The MSC Institute of Technology is located at:
2 MacArthur Place
Santa Ana, CA 92707
Phone: (714) 444-5155, (714) 444-5160
The Institute maintains state-of-the-art classroom facilities and individual computer graphics laboratories at training centers throughout the US. All of our courses emphasize hands-on computer laboratory work to facilitate skills development.
Courses can be taught on-site, and can even be customized to meet your business’ specific needs. We also offer video courses and a specialized instructor’s program.
For detailed course descriptions and schedule information, call (800) 732-7211 or send e-mail to: msctraining.support@mscsoftware.com.
How to Register
To register for a class, call the Seminar Coordinator in Santa Ana, California at (800) 732-7211, access the Online Registration Form, or leave a message with the automated message and information system by selecting the MSC Institute Course Information option. You can use this system to register, leave messages, and obtain course information 24 hours a day.
Please be prepared to provide the following information:
The course name and number.
The location of the course.
Your company name, mailing address, and telephone number.
Payment information.
MSC Partners
MSC works in partnership with other internationally respected technology organizations, including the world’s leading CAD, analysis software, and computer hardware companies.
CAD Partners
Hardware Partners
Unigraphics Solutions, Inc.
Dassault Systemes
Parametric Technology
Accel Graphics
Adaptec
Dell
Compaq/Digital
Cray Research
Dynamic Pictures
Hewlett-Packard
IBM
Intel
Intergraph
Silicon Graphics
Sun
Analysis Partners
nCode International
AEA International
SAMCEF
ZONA Technologies
Documentation Conventions
This guide uses several font styles to denote computer filenames, system messages, user input, and other documentation conventions.
File names appear in monospaced font within a line of text: /usr/netls.
System messages or prompts also appear in monospaced font and appear on a separate line:
-r--r--r-- 1 bin bin 40 Nov 2 1991 .pwrshd
User input appears in monospaced font on a separate line:
# openwin -dev /dev/cgtwelve0 defdepth 24
The “#” command prompt indicates that root or superuser access is required to issue the command.
The “%” command prompt signals that a general user can issue the command.