练习一：ANSYS上机习题(2008new) - 解释

有限元分析软件

ANSYS

上 机 习 题

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 Project5 Project6 Project7

受热载荷作用的厚壁圆筒的有限元建模与温度场求解………………..7 超静定桁架的有限元求解………………………………………………..9 超静定梁的有限元求解………………………………………………….11 平板的有限元建模与变形分析………………………………………… 13 I

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。

梁承受均布载荷：1.0e5 Pa 10m

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=0.15 R=0.1 w1=0.1，w2=0.1，w3=0.2,

t1=0.0114，t2=0.0114，t3=0.007

1.1 进入ANSYS

程序 →ANSYSED 6.1 →Interactive →change the working directory into yours →input Initial jobname: beam→Run 1.2设置计算类型 2

ANSYS Main Menu: Preferences →select Structural → OK 1.3选择单元类型

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) 1.4定义材料参数

ANSYS Main Menu: Preprocessor →Material Props →Material Models →Structural →Linear →Elastic →Isotropic →input EX:2.1e11, PRXY:0.3 → OK 1.5定义截面

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=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 →OK

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1.6生成几何模型 ? 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

1.7 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)

1.8 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,UZ,ROTX → OK

? 最右端节点加约束

ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Displacement → On Nodes →pick the node at (10,0) → OK → select UY,UZ,ROTX → OK

? 施加y方向的载荷

ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Pressure → On Beams →Pick All →VALI:100000 → OK

1.9 分析计算

ANSYS Main Menu: Solution →Solve →Current LS →OK(to close the solve Current Load Step window) →OK

1.10 结果显示

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, UY, Def + Undeformed , Rotation, ROTZ ,Def + Undeformed→OK 1.11 退出系统

ANSYS Utility Menu: File→ Exit →Save Everything→OK

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