教程5.13g加密所屬

1、WORKSHOP 3Structure Subjected to 3 loading conditionsRoof Truss Subjected to Point Loads (cont.)Figure 1-1 Workshop # 3 (cont.)This is a continuation of the workshop #2In this example,we will add 2 additional loading conditions:SUBCASE 20 = thermal loading a. initial temperature = 70 degrees b. load

2、ing temperature = 100 degrees4. SUBCASE 30 = Gravity loadingApply a 1-g(386.0886 in/sec2) in the negative Y-directionSuggested Exercise Steps:Copy previous PATRAN workshop db file:w2.db to another name called w3.dbOpen the PATRAN database and bring in the w3.dbThere is already a loadcase called defa

3、ult from workshop 2.Create a new loadcase in PATRAN, (second loadcase) is called thermal,copy all the loading from the first loadcase to thermal except the force loading.Create thermal load in LOAD/BC, and include this thermal load in this loadcaseCreate another loadcase in PATRAN,(third loadcase) i

4、s called gravity,copy all the loading from the first loadcase to gravity except the force loading.Create gravity load in LOAD/BC, and include this thermal load in this loadcaseSubmit the model to MSC.Nastran for analysis.Post-Process results using MSC.Patran.Step 1. Load Case: Create /Load Case Name

5、: thermal load Create a new load case: thermal load.Type in thermal load for the Loadcase name.Click on the Assign/Prioritize Load/BCs button to bring up the menu on the far right.Click on the boundary conditions from the top left cornerSelect clamp, dof456, and rightside.Click OK to return to the m

6、ain material menu.Click Apply.dStep 2. Loads/BCs: Create/ Temperature /Nodal Create the temperature load of 100 degree on all grids on the model:Create / Temperature/ Nodal.Input name: temp_load_100Click on the Input Data.Enter 100 for the Temperature field.Click OK.Click on Select Application Regio

7、n.Select FEM as the geometry filter.Select Node 1:7 (all the nodes) for the Application Region.Click Add.Click OK.Click Apply.Step 2A: Plot of the temperature loadStep 3. Load Case: Create /Load Case Name: gravity load Create a new load case: gravity load.Type in thermal load for the Loadcase name.C

8、lick on the Assign/Prioritize Load/BCs button to bring up the menu on the far right.Click on the boundary conditions from the top left cornerSelect clamp, dof456, and rightside.Click OK to return to the main material menu.Click Apply.dStep 4. Loads/BCs: Create/ Inertial Load /Element Uniform Create

9、gravity load Create/Inertial Load/Element UniformInput name: gravity_loadClick on the Input Data.Enter for the Trans Accel field.By default gravity load apply on all elements of the model, and therefore you do not need to Select Application RegionClick OK.Click Apply.Step 4A: Plot of the gravity loa

10、dStep 5. Analysis: Analyze/ Entire Model/Full Run Submit the model for analysis.Analyze / Entire Model / Full Run.Click on the Solution Type.Select LINEAR STATIC as the Solution Type.Click OK.Click Direct Text input.Step 6. Direct Text Input Case Control Section Direct text inputClick on the button-

11、Case Control Section.Enter TEMP(INIT)=20Click OK.Step 7. Direct Text Input Bulk Data Section Direct text inputClick the button-Bulk Data Section.Enter TEMPD,20,70.0 Click OK.Click on the Subcase SelectStep 8. Analysis: Subcase Select Be sure the click the subcases in the following orderClick On the

12、Default from the top menu first.Followed by selecting thermal load, and then gravity load.Click OK.Click Apply.Step 9. Analysis: Attach XDB/ Result Entities/ Local Attach the XDB result file.Attach XDB / Result Entities / Local.Click on Select Result File.Select the file called w3.xdbClick OK.Click Apply.Step 10. Results: Create/Quick Plot Create a Quick Plot of the results.Create / Quick Plot.Select SC2 result case.Select Displacement, Translational for the Deformation Result.C