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1、1,ANSYS空间问题,2,ANSYS求解空间问题实例,内半径ri=104.6mm,内半径r0=109.7mm厚度h=2.54mm,所对应的圆心角为90度的圆弧形曲梁,在下端固定,上端作用有集中力4.4483,材料E=70GPa,m=0.25 用Solid92确定自由端的挠度和固定端的最大拉应力和压应力。,3,1) 初步分析,材料力学:自由端位移,最大应力,固定端弯矩,抗弯截面模量和面积,4,最大拉应力,最大压应力,弹性力学,5,自由端挠度的误差,应力的误差,细长比越大,误差将更大,6,2、分析类型,静力分析,3、问题描述,空间问题,4、ANSYS单位,mm N MPa,5、单元,SOLID9
2、2:10节点四面体(每个节点个自由度),6、材料,弹性模量和泊松比,7,Start Programs ANSYS 9.0ANSYS Product Laucher,8,ANSYS Main Menu: Preferences select Structural OK,、过滤菜单,9,ANSYS Main Menu: Preprocessor Modeling Create Volumes Cylinder Partial Cylinder 依次按右图输入:OK,2、实体建模,建立曲梁,10,3、划分网格,1)定义单元类型,ANSYS Main Menu: Preprocessor Elemen
3、t TypeAdd/Edit/Delete Add select Solid 10node 92 OK (back to Element Types window) Close (the Element Type window),11,3、划分网格,2)定义材料(弹性模量,泊松比),ANSYS Main Menu: Preprocessor Material Props Material Models Structural Linear Elastic Isotropic input EX:70e3, PRXY:0.25 OK,12,3、划分网格,1)网格密度设置,ANSYS Main Men
4、u: Preprocessor Meshing Mesh Tool 利用智能网格划分(如下图设置,级别为),13,3、划分网格,)划分网格,Mesh Tool Mesh : select Volumes Shape:TetFree Mesh Pick All Close( the Mesh Tool window),14,15,4、求解,1)施加位移边界条件与加载,给节点816施加y方向的集中力 ANSYS Main Menu: Solution Define Loads Apply Structural Force/Moment On Nodes 拾取节点816OK Lab: FY, Val
5、ue: 4.4483OK,16,17,给底面施加固定约束 ANSYS Main Menu: Solution Define Loads Apply Structural Displacement On Areas 拾取底面 OK select Lab2:ALL OFF OK,18,19,4、求解,2) 定义分析类型并求解,Preprocessor Solution Analysis Type New Analysis,ANSYS Main Menu: Solution Solve Current LS OK(to close the solve Current Load Step window
6、) OK,20,5、后处理,1) 挠度,ANSYS Main Menu: General Postproc Plot Results Contour Plot Nodal Solution 选择DOF Solution Y-Component of displacement OK,21,22,ANSYS Main Menu: General Postproc List Results Contour Plot Nodal Solution 选择DOF Solution Y-Component of displacement OK,23,5、后处理,2) 图示Y方向的应力,ANSYS Main Menu: General Postproc Plot Results Contour Plot Nodal Solution 选择Stress Y-Component of stress OK,24,