Download - Ws01 Landing Gear Strut 011105
WS1-1
WORKSHOP 1
LANDING GEAR STRUT ANALYSIS
NAS120, 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
Workshop ObjectivesLearn the typical workflow of a finite element analysis using MSC.Patran and MSC.Nastran.
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.
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Step 1. Create New Database
Create a new database called strut.dba. 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.
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Step 2. Import Geometry
Import the parasolid filea. File : Import.b. Select the file
strut.xmt.c. Click Apply.
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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.
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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.
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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.
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Step 4. Apply Loads and Boundary Conditions
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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.
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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.
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Step 4. Apply Loads and Boundary Conditions
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Step 5. Create Material Properties
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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.
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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.
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Apply the physical propertiesa. Click in the Select
Members box.b. Screen pick the entire
solid as shown.c. Click Add.d. Click Apply.
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Step 6. Create Physical Properties
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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.
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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.
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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.
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