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1、教程2：超靜定桁架的有限元分析三桿軸力計(jì)算的有限元分析如圖所示平行桿系1、2、3懸吊著橫梁AB（AB的變形略去不計(jì)），在橫梁上作用著載荷P=100KN。如桿1、2、3的截面積、長(zhǎng)度、彈性模量均相同，即分別為A=0.0003m2，l=2m，E=200GPa。求1、2、3三桿的軸力N1、N2、N3。習(xí)題文件名:gan。（劉鴻文編《材料力學(xué)》上冊(cè)第78頁(yè)習(xí)題2.43）圖三桿軸力的計(jì)算分析模型此題理論解為N1=83.333KN，N2=33.333KN，N3=16.667KN交互式的求解過(guò)程1進(jìn)入ANSYS程序→ANSYS8.0→ConfigureANSYSProducts→fileMan
2、agement→inputjobname:gan→Run2設(shè)置計(jì)算類(lèi)型ANSYSMainMenu:Preferences→selectStructural→OK3選擇單元類(lèi)型ANSYSMainMenu:Preprocessor→ElementType→Add/Edit/Delete…→Add…→selectLink2Dspar1→Apply→selectConstraintNonlinearMPC184→OK(backtoElementTypeswindow)選中TYPE2→options→在K1的下拉列表中選擇：RigidBeam，K2下拉列表中選擇：DirectElimina
3、tion→OK→Close(theElementTypewindow)。4定義實(shí)常數(shù)ANSYSMainMenu:Preprocessor→RealConstants→Add/Edit/Delete…→Add…→selectType1→OK→inputAREA:0.0003→OK→Close5定義材料參數(shù)ANSYSMainMenu:Preprocessor→MaterialProps→MaterialModels→Structural→Linear→Elastic→Isotropic→inputEX:200e9→OK→Close(theMaterialPropswindow)ANS
4、YSMainMenu:Preprocessor→Modeling→Create→Elements→ElemAttributes…→MATselect16生成有限元模型6.1生成節(jié)點(diǎn)ANSYSMainMenu:Preprocessor→Modeling→Create→Nodes→InActiveCS→input:1(-1,0,0)→Apply→input:3(1,0,0)→OKANSYSMainMenu:Preprocessor→Modeling→Create→Nodes→FillbetweenNds→select1,3節(jié)點(diǎn)→OK→OKANSYSMainMenu:Preproces
5、sor→Modeling→Create→Nodes→InActiveCS→input:4(-1,-2,0)→Apply→input:6(1,-2,0)→OKANSYSMainMenu:Preprocessor→Modeling→Create→Nodes→FillbetweenNds→select4,6節(jié)點(diǎn)→OK→OK6.2生成三桿模型ANSYSMainMenu:Preprocessor→Modeling→Create→Elements→AutoNumbered→ThruNodes→select1,4節(jié)點(diǎn)→Apply→select2,5節(jié)點(diǎn)→Apply→select3,6節(jié)點(diǎn)→OK
6、7定義多點(diǎn)約束ANSYSMainMenu:Preprocessor→Modeling→Create→Elements→ElemAttributes…→TYPEselect2MPC184ANSYSMainMenu:Preprocessor→Modeling→Create→Elements→AutoNumbered→ThruNodes→select4,5節(jié)點(diǎn)→Apply→select4,6節(jié)點(diǎn)→OK8模型施加約束8.1分別給1,2,3三個(gè)節(jié)點(diǎn)施加約束ANSYSMainMenu:Solution→DefineLoads→Apply→Structural→Displacement→OnN
7、odes→select1,2,3三個(gè)節(jié)點(diǎn)→OK→selectLab2:ALLDOF→OK8.2給4節(jié)點(diǎn)施加y方向載荷ANSYSMainMenu:Solution→DefineLoads→Apply→Structural→Force/Moment→OnNodes→select4節(jié)點(diǎn)→OK→Lab:FY,Value:-100000→OK9分析計(jì)算ANSYSMainMenu:Solution→Solve→CurrentLS→OK(toclosethesolveCurrentLoadSt
