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MSC.Software Corporation2 MacArthur Place
Santa Ana, CA 92707, USATel: (714) 540-8900Fax: (714) 784-4056
Web: http://www.mscsoftware.com
Linear Static, Normal Modes, and Buckling Analysis Using MSC.Nastran and MSC.Patran
January 2005
NAS120 Workbook
Part Number: NA*V2005*Z*Z*Z*SM-NAS120-WBK
Munich, GermanyTel: (+49)-89-43 19 87 0Fax: (+49)-89-43 61 716
United StatesTel: 1-800-732-7284Fax: (714) 979-2990
Tokyo, JapanTel: 81-3-6911-1200Fax: 81-3-6911-1201
DISCLAIMER
MSC.Software Corporation reserves the right to make changes in specifications and other information contained in this document without prior notice.
The concepts, methods, and examples presented in this text are for illustrative and educational purposes only, and are not intended to be exhaustive or to apply to any particular engineering problem or design. MSC.Software Corporation assumes no liability or responsibility to any person or company for direct or indirect damages resulting from the use of any information contained herein.
User Documentation: Copyright© 2005 MSC.Software Corporation. Printed in U.S.A. All Rights Reserved.
This notice shall be marked on any reproduction of this documentation, in whole or in part. Any reproduction or distribution of this document, in whole or in part, without the prior written consent of MSC.Software Corporation is prohibited.
MSC and MSC. are registered trademarks and service marks of MSC.Software Corporation. NASTRAN is a registered trademark of the National Aeronautics and Space Administration. MSC.Nastran is an enhanced proprietary version developed and maintained by MSC.Software Corporation. MSC.Actran, MSC.ADAMS, MSC.Dytran, MSC.EASY5, MSC.FlightLoads, MSC.Fatigue, MSC.Marc, MSC.Marc Mentat, MSC.Nastran, MSC.Patran, MSC.Laminate Modeler, MSC.Mvision, MSC.Robust Design, SimDesigner, MSC.SimManager, MSC.SOFY, MSC.visualNastran Desktop, and MSC.visualNastran for Windows are all trademarks of MSC.Software Corporation.
All other trademarks are the property of their respective owners.
TABLE OF CONTENTS
Workshop 1 Landing Gear Strut
Workshop 2 Simply Supported Beam
Workshop 3 Editing a Nastran Input File
Workshop 4 Stadium Truss
Workshop 5 Coordinate Systems
Workshop 6 Bridge Truss
Workshop 7 Tapered Plate
Workshop 8 Tension Coupon
Workshop 9 2 1/2 D Clamp
Workshop 10 Support Bracket
Workshop 11 Spacecraft Fairing
Workshop 12 RBE2 vs. RBE3
Workshop 13 Normal Modes of a Rectangular Plate
Workshop 14 Buckling of a Submarine Pressure Hull
Workshop 15 Parasolid Modeling
Workshop 16 Stiffened Plate
Workshop 17 Importing a Temperature Field
Workshop 18 Importing a Pressure Field
WS1-1
WORKSHOP 1
LANDING GEAR STRUT ANALYSIS
NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
WS1-2NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
WS1-3NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Problem DescriptionA landing gear strut has been designed for a new fighter jet. Determine if the landing gear strut has been designed properly to withstand the landing load.E = 30 x 106 psi ν =0.3Landing Load = 7,080 lb
WS1-4NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Workshop ObjectivesLearn the typical workflow of a finite element analysis using MSC.Patran and MSC.Nastran.
WS1-5NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Suggested Exercise Steps1. Create a new database and name it strut.db. 2. Import the strut geometry.3. Mesh the strut to create solid elements. 4. Apply Loads and Boundary Conditions.5. Create material properties. 6. Create physical properties.7. Run analysis with MSC.Nastran.8. Read the results into MSC.Patran.9. Plot the Von Mises stress and displacement.
WS1-6NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
a
b c
d
f
g
Step 1. Create New Database
Create a new database called strut.db
a. File / New.b. Enter strut as the file name.c. Click OK.d. Choose Tolerance Based on
Model.e. Select MSC.Nastran as the
Analysis Code.f. Select Structural as the
Analysis Type.g. Click OK.
a
e
WS1-7NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 2. Import Geometry
Import the parasolid filea. File : Import.b. Select the file
strut.xmt.c. Click Apply.
b
c
a
WS1-8NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 3. Mesh the Object
Create a solid mesha. Elements: Create / Mesh
/ Solid.b. Select the entire solid.c. Deselect Automatic
Calculation under Global Edge Length.
d. Enter 0.5 for the Global Edge Length.
e. Click Apply.f. Click on the Iso2 View
Icon.
a
b
cd
e
f
WS1-9NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 4. Apply Loads and Boundary Conditions
Create a boundary conditiona. Loads/BCs: Create /
Displacement / Nodal.b. Enter hub cylinder as the
New Set Name.c. Click Input Data.d. Enter <0 0 0> for
Translations. e. Click OK.
b
c
d
e
a
WS1-10NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Apply the boundary conditiona. Click Select
Application Region.b. For the Geometry
Filter select Geometry.
c. Set the Selection Filter to Surface or Face and select the cylinder at the bottom of the strut, as shown.
d. Click Add.e. Click OK. f. Click Apply.
ae
f
d
b
Step 4. Apply Loads and Boundary Conditions
c
WS1-11NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 4. Apply Loads and Boundary Conditions
Create a loada. Loads/BCs: Create / Total
Load / Element Uniform.b. Enter landing load as the
New Set Name.c. Click Input Data.d. Enter <0 –7080 0> for
Load. e. Click OK.
b
c
d
e
a
WS1-12NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Apply the loada. Click Select
Application Region.b. For the Geometry
Filter select Geometry.
c. Select the upper circular surface at the top of the strut, as shown.
d. Click Add.e. Click OK. f. Click Apply.
ae
f
d
b
Step 4. Apply Loads and Boundary Conditions
c
WS1-13NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 5. Create Material Properties
a
c
b
Create an isotropic materiala. Materials: Create / Isotropic
/ Manual Input.b. Enter steel for the Material
Name.c. Click Input Properties.d. Enter 30e6 for the Elastic
Modulus.e. Enter 0.3 for the Poisson
Ratio.f. Click OK. g. Click Apply.
d
gf
e
WS1-14NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 6. Create Physical Properties
Create physical propertiesa. Properties: Create / 3D /
Solid.b. Enter strut as the Property
Set Name.c. Click Input Properties.d. Select steel as the
material.e. Click OK.
a
b
c
e
d
WS1-15NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Apply the physical propertiesa. Click in the Select
Members box.b. Screen pick the entire
solid as shown.c. Click Add.d. Click Apply.
ac
d
Step 6. Create Physical Properties
b
WS1-16NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 7. Run Linear Static Analysis
Analyze the modela. Analysis: Analyze /
Entire Model / Full Run.
b. Click Solution Type.c. Choose Linear Static
as the Solution Type.d. Click OK.e. Click Apply.
a
b
c
d
e
WS1-17NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 8. Read Results into MSC.Patran
Attach the results filea. Analysis: Access Results /
Attach XDB / Result Entities.
b. Click Select Results File.c. Choose the results file
strut.xdb.d. Click OK. e. Click Apply.
a
b
c
e
d
WS1-18NAS120, Workshop 1, January 2005Copyright© 2005 MSC.Software Corporation
Step 9. Plot Stress and Displacement
Create a quick plota. Results: Create / Quick
Plot.b. Select Stress Tensor as
the Fringe Result.c. Select Displacements,
Translational as the Deformation Result.
d. Click Apply.e. Click on the Iso1 View
Icon.
a
d
c
b
e
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