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1、练习一梁的有限元建模与变形分析计算分析模型如图1-1所示,习题文件名:beam。NOTE:要求选择不同形状的截面分别进行计算。图1-1梁的计算分析模型梁截面分别采用以下三种截面(单位:m):矩形截面:圆截面:工字形截面:B=0.1,H=0.15R=0.1w1=0.1,w2=0.1,w3=0.2,t1=0.0114,t2=0.0114,t3=0.0071.1进入ANSYS程序→ANSYSED→Interactive→changetheworkingdirectoryintoyours→inputInitialjobname:beam→Run1.2设置计算类型AN
2、SYSMainMenu:Preferences→selectStructural→OK1.3选择单元类型ANSYSMainMenu:Preprocessor→ElementType→Add/Edit/Delete…→Add…→selectBeam2node188→OK(backtoElementTypeswindow)→Close(theElementTypewindow)1.4定义材料参数ANSYSMainMenu:Preprocessor→MaterialProps→MaterialModels→Structural→Linear→Elastic→Isot
3、ropic→inputEX:2.1e11,PRXY:0.3→OK1.5定义截面ANSYSMainMenu:Preprocessor→Sections→Beam→CommonSectns→分别定义矩形截面、圆截面和工字形截面:矩形截面:ID=1,B=0.1,H=0.15→Apply→圆截面:ID=2,R=0.1→Apply→工字形截面:ID=3,w1=0.1,w2=0.1,w3=0.2,t1=0.0114,t2=0.0114,t3=0.007→OK1.6生成几何模型ü生成特征点ANSYSMainMenu:Preprocessor→Modeling→Create→
4、Keypoints→InActiveCS→依次输入三个点的坐标:input:1(0,0),2(10,0),3(5,1)→OKü生成梁ANSYSMainMenu:Preprocessor→Modeling→Create→Lines→lines→Straightlines→连接两个特征点,1(0,0),2(10,0)→OK1.7网格划分ANSYSMainMenu:Preprocessor→Meshing→MeshAttributes→Pickedlines→OK→选择:SECT:1(根据所计算的梁的截面选择编号);PickOrientationKeypoint(s
5、):YES→拾取:3#特征点(5,1)→OK→MeshTool→SizeControls)lines:Set→PickAll(inPickingMenu)→inputNDIV:5→OK(backtoMeshToolwindow)→Mesh→PickAll(inPickingMenu)→Close(theMeshToolwindow)1.8模型施加约束ü最左端节点加约束ANSYSMainMenu:Solution→DefineLoads→Apply→Structural→Displacement→OnNodes→pickthenodeat(0,0)→OK→sel
6、ectUX,UY,UZ,ROTX→OKü最右端节点加约束ANSYSMainMenu:Solution→DefineLoads→Apply→Structural→Displacement→OnNodes→pickthenodeat(10,0)→OK→selectUY,UZ,ROTX→OKü施加y方向的载荷ANSYSMainMenu:Solution→DefineLoads→Apply→Structural→Pressure→OnBeams→PickAll→VALI:→OK1.9分析计算ANSYSMainMenu:Solution→Solve→CurrentLS→
7、OK(toclosethesolveCurrentLoadStepwindow)→OK1.10结果显示ANSYSMainMenu:GeneralPostproc→PlotResults→DeformedShape…→selectDef+Undeformed→OK(backtoPlotResultswindow)→ContourPlot→NodalSolu→select:DOFsolution,UY,Def+Undeformed,Rotation,ROTZ,Def+Undeformed→OK1.11退出系统ANSYSUtilityMenu:File→Exit→S
8、aveEverything→OK练习二