作业一 平面桁架ansys 分析
用ansys 分析图1。

设250.1,100.2cm A MPa E =⨯=。

图1
1 设置计算类型
Preferences →select Structural →OK
2 选择单元类型
Preprocessor →Element Type →Add/Edit/Delete →Add →Link 3D finit stn 180 →OK 3 定义实常数
ANSYS Main Menu: Preprocessor →Real Constants… →Add… →select Type 1→OK →input AREA:1 →OK →Close (the Real Constants Window)
4 定义材料属性
ANSYS Main Menu: Preprocessor →Material Props →Material Models →Structural →Linear →Elastic →Isotropic →input EX:2.0e5, PRXY:0.3 →Material →Exit
5 生成几何模型生成关键点，如图2.
图 2
ANSYS Main Menu: Preprocessor →Modeling →Create →Keypoints →In Active CS →
1(3,0),2(0,0),3(0,30) →OK
生成桁架
ANSYS Main Menu: Preprocessor →Modeling →Create →Lines →Lines →Straight Line →依次连接点2→1→3→1→OK如图3.
图3
6 网格划分，如图4.
ANSYS Main Menu: Preprocessor →Meshing →Mesh Tool→(Size Controls) lines: Set →Pick All :OK→input NDIV: 1 →OK →(back to the mesh tool window)Mesh: lines →Mesh→Pick All (in Picking Menu) →Close( the Mesh Tool window)
图 4
7 模型施加约束与载荷，如图5.
分别给1,3两个关键点施加约束
ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Displacement →On Keypoints →拾取2→Apply →select Lab2:ALL DOF→Apply→拾取3→OK→select Lab2:UX→OK 给1关键点施加y方向载荷
ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Force/Moment →On Keypoints →拾取特征点2→OK →Lab: FY, Value: -10→OK
图 5
8 分析计算
ANSYS Main Menu: Solution →Solve →Current LS →OK(to close the solve Current Load Step window) →OK
9 结果显示，如图6.
ANSYS Main Menu: General Postproc →Plot Results →Deformed Shape→select Def + undeformed →OK (back to Plot Results window) →Contour Plot →Nodal Solu… →select: DOF Solution, Y-Component of displacement, Deformed shape with undeformed model →OK
图6。