ANSYS基础培训练习7

2 热应力分析有齿的轴对称管的热应力分析问题描述:管受内压，顶上的线（在Y=1.）代表对称面，我们将对线上的所以节点耦合UY自由度，下图说明了载荷及材料1.进入ANSYS工作目录，取工作文件名为“pipe-th-str” 2.Resume前面定义的轴对称模型:Utility Menu Resume from 3.设置菜单过滤为Structural:Main Menu Preferences 选则“Structural” 并且不选择“Thermal”, 单击 OK4.改变title:Utility Menu File Change Title . /TITLE = “2D AXI-SYMM THERMAL-STRESS ANALYSIS W/ INT. PRESS - ESIZE=0.125”OK5.删除实体模型上的对流载荷:Main Menu Preprocessor Loads -Loads- Delete All Load Data All SolidMod Lds OK6.将热单元改变为相应的结构单元:Main Menu Preprocessor Element Type Switch Elem Type 选择 “Thermal to Struc”, 单击 OK查看警告信息并单击 Close7.设置单元形态为轴对称axisymmetric:Main Menu Preprocessor Element Type Add/Edit/Delete Options .设置 K3 = Axisymmetric, 单击 OKClose8.从热分析中施加温度载荷:Main Menu Preprocessor Loads -Loads- Apply Temperature From Therm Analy .选择结果文件单击 OK查看警告信息单击 Close9.给Y0的线施加对称边界条件： Main Menu Preprocessor Loads -Loads- Apply Displacement Symmetry B.C.- On Lines +选择线 1 和 9, 单击 OK10.耦合Y=1节点的 UY 自由度:10a. 选择Y=1处的节点:Utility Menu Select Entities .选择 “Nodes” 及“By Location”选择 “Y coordinates”设置 Min,Max to 1, 单击 OK10b. 对选择的节点集定义UY自由度耦合:Main Menu Preprocessor Coupling / Ceqn Couple DOFs +Pick AllNSET = 1设置 Lab = UY, 单击 OKUtility Menu Select Everything11.给线施加内部常压力:Main Menu Loads -Loads- Apply Pressure On Lines +选择线 4, 单击 OKVALUE = 1000, 单击 OK12.通过显示体载荷检验温度载荷:Utility Menu PlotCtrls Symbols设置Body Load Symbols = “Structural temps”, 单击 OKUtility Menu Plot Elements13.存储数据库并获得结果:拾取 “SAVE_DB” (或选择: Utility Menu File Save as Jobname.db)Main Menu Solution -Solve- Current LS查看 “/STATUS 命令” 窗口并关闭OKClose -求解结束之后关闭黄色的提示窗口14.进入后处理查看结果:Main Menu General Postproc 14a. 画位移:Main Menu General Postproc Plot Results -Contour Plot- Nodal Solu .拾取“DOF solution” 及 “Translation USUM”, 选择 “Def + undef edge”, 单击 OK14d. 沿Y轴旋转90度并沿x-z 平面映射轴对称应力结果:Utility Menu PlotCtrls Style Symmetry Expansion 2D Axi-Symmetric .拾取 “1/4 expansion” and set reflection to “yes”, 单击 OKUtility Menu PlotCtrls Pan, Zoom, Rotate ISO15.存盘并离开ANSYS:3模态分析利用壳单元，分析一块平板的自由状态的模态采用SHELL181单元模型尺寸：长4m,宽1.5m壳单元厚度为0.1m材料取为一般的钢材即EX2E11，NUXY0.3, DENS=7800利用BLOCK Lanzos方法提取并扩展10阶