本科生ANSYS上机指南.doc

“有限元分析及应用”本科生课程
有限元分析软件
ANSYS
上机指南
目录
Project1 简支梁的变形分析……………………………………………………….1
Project2 坝体的有限元建模与受力分析………………………………………….3
Project3 受内压作用的球体的应力与变形分析…………………………………..5
Project4 受热载荷作用的厚壁圆筒的有限元建模与温度场求解………………..7
Project5 超静定桁架的有限元求解………………………………………………..9
Project6 超静定梁的有限元求解………………………………………………….11
Project7 平板的有限元建模与变形分析………………………………………… 13
Project1 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=, H= R= w1=,w2=,w3=,
t1=,t2=,t3=
进入ANSYS
程序→ANSYSED →Interactive →change the working directory into yours →input Initial jobname: beam→Run

ANSYS Main Menu: Preferences →select Structural → OK

ANSYS Main Menu: Preprocessor →Element Type→Add/Edit/Delete…→Add…→select Beam 2 node 188 →OK (back to Element Types window) →Close (the Element Type window)

ANSYS Main Menu: Preprocessor →Material Props →Material Models →Structural →Linear →Elastic →Isotropic →input EX:, PRXY: → OK

ANSYS Main Menu: Preprocessor →Sections →Beam →Common Sectns →分别定义矩形截面、圆截面和工字形截面:矩形截面:ID=1,B=,H= →Apply →圆截面:ID=2,R= →Apply →工字形截面:ID=3,w1=,w2=,w3=,t1=,t2=,t3= →OK

生成特征点
ANSYS Main Menu: Preprocessor →Modeling →Create →Keypoints →In Active CS →依次输入三个点的坐标:input:1(0,0),2(10,0),3(5,1) →OK
生成梁
ANSYS Main Menu: Preprocessor →Modeling →Create →Lines →lines →Straight lines →连接两个特征点,1(0,0),2(10,0) →OK
网格划分
ANSYS Main Menu: Preprocessor →Meshing →Mesh Attributes →Picked lines →OK →选择: SECT:1(根据所计算的梁的截面选择编号);Pick Orientation Keypoint(s):YES→拾取:3#特征点(5,1) →OK→Mesh Tool →Size Controls) lines: Set →Pick All(in Picking Menu) →input NDIV:5 →OK (back to Mesh Tool window) → Mesh →Pick All (in Picking Menu) → Close (the Mesh Tool window)
模型施加约束
最左端节点加约束
ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Displacement → On Nodes →pick the node at (0,0) → OK → select UX, UY