石油大学有限元ansys 练习9A选择.ppt

1、筒仓,练习 9A 选择,January 30, 2001 Inventory #001442 W9-2,9A. 选择筒仓,说明 选择对象, 指定实体单元属性并划分网格. 模型由壳和梁组成.,January 30, 2001 Inventory #001442 W9-3,9A. 选择筒仓,单元类型: 柱和锥体全部用SHELL63 (类型1)单元. 锥体的肋用BEAM4 (类型2)单元.,January 30, 2001 Inventory #001442 W9-4,9A. 选择筒仓,材料: 柱体用混凝土材料（材料2）. 锥体及其肋用钢材 (材料 1).,January 30, 2001 Inve

2、ntory #001442 W9-5,9A. 选择筒仓,实常数: 壳厚度 = 1.0 (实常数 1) 用于柱体. 壳厚度 = 0.375 (实常数 2) 用于锥体上部. 壳厚度 = 0.25 (实常数 3) 用于锥体下部. 梁常数 (实常数 4)用于肋.,January 30, 2001 Inventory #001442 W9-6,9A. 选择筒仓,1.按教师指定的工作目录，用“silo”作为作业名，进入ANSYS: Utility Menu File Resume from 选择 “silo.db1”数据库文件,然后按 OK 或者用命令: RESUME,silo,db1 3.在 “选择实体

3、” 菜单上选择柱体区域: Utility Menu Select Entities 选择 “Areas”, “By Location”, “Z coordinates” 设置Min,Max = 0,120 按Apply 按Plot 或者用命令: ASEL,S,LOC,Z,0,120 APLOT,January 30, 2001 Inventory #001442 W9-7,9A. 选择筒仓,4.指定柱体模型属性: Main Menu Preprocessor MeshTool 选择 “Areas” , 然后按 Set 拾取Pick All 设置MAT = 2 设置REAL = 1 设置TYPE

4、 = “1 SHELL63” 按OK 或者用命令: AATT, 2, 1, 1,January 30, 2001 Inventory #001442 W9-8,9A. 选择筒仓,5 指定锥体的属性: Utility Menu Select Entities 选择 “Areas” 拾取Pick all 按Plot Utility Menu Select Entities 选择 “Areas ” ， “By Num / Pick” 按Apply 拾取图中面的右边. 按OK 按Plot Main Menu Preprocessor MeshTool 选择 “Areas”,然后 按Set 拾取Pick

5、 all 设置MAT = 1 设置REAL = 2 设置TYPE = “1 SHELL63” 按OK 或者用命令: ASEL,S,P APLOT AATT, 1, 2, 1,January 30, 2001 Inventory #001442 W9-9,9A. 选择筒仓,6.选择锥体下部，指定实体模型属性: Utility Menu Select Entities 选择 “Areas”, “By Location”, “Z coordinates” 设置Min,Max = -60,-30 按Apply 按Replot Main Menu Preprocessor MeshTool 选择 “Ar

6、eas”,然后 按Set 拾取Pick All 设置MAT = 1 设置REAL = 3 设置TYPE = “1 SHELL63” 按OK 或者用命令: ASEL,S,LOC,Z,-60,-30 APLOT AATT, 1, 3, 1,January 30, 2001 Inventory #001442 W9-10,9A. 选择筒仓,7.在锥体上选择线，然后指定单元属性: Utility Menu Select Entities 选择 “Lines”, “By Location”, “Z coordinates” 设置Min,Max = -60,0 按Apply 按Plot Main Menu

7、 Preprocessor MeshTool 选择单元属性下的 “Lines”:,然后 Set 拾取Pick All 设置MAT = 1 设置REAL = 4 设置TYPE = “2 BEAM4” 按OK 或者用命令: LSEL,S,LOC,Z,-60,0 LPLOT LATT, 1, 4, 2,January 30, 2001 Inventory #001442 W9-11,9A. 选择筒仓,8.用 BEAM4 单元划分线: Main Menu Preprocessor MeshTool 在网格菜单下选择 “Lines”:,然后 按Mesh 拾取Pick All 或者用命令: LMESH,A

8、LL,January 30, 2001 Inventory #001442 W9-12,9A. 选择筒仓,9.选择全部实体，用SHELL63 单元划分面: Utility Menu Select Everything Utility Menu Plot Areas Main Menu Preprocessor MeshTool 在网格划分工具中选择 “Areas”:,然后按 Mesh 拾取Pick All 或者用命令: ALLSEL,ALL APLOT AMESH,ALL,January 30, 2001 Inventory #001442 W9-13,9A. 选择筒仓,10.打开单元材料号并

9、画单元: Utility Menu PlotCtrls Numbering . Elem / Attrib numbering = “Material numbers” 按OK 或者用命令: /PNUM,MAT,1 EPLOT,January 30, 2001 Inventory #001442 W9-14,9A. 选择筒仓,打开实常数号并画单元: Utility Menu PlotCtrls Numbering . Elem / Attrib numbering = “Real const num” 按OK 或者用命令: /PNUM,REAL,1 EPLOT,January 30, 2001

10、 Inventory #001442 W9-15,9A. 选择筒仓,12.存储网格模型并退出ANSYS: Utility Menu File Save as 输入数据库文件名“silo-mesh.db”,按 OK Pick the “QUIT” button in the Toolbar 选择 “Quit - No Save!” 按OK 或者用命令: SAVE,silo-mesh,db FINISH /EXIT,NOSAVE,叶轮拖拉,练习 9B 选择,January 30, 2001 Inventory #001442 W9-17,9B. 选择叶轮拉伸,说明 通过选择, 把二维四边形网格的面

11、拖拉为三维块体单元的叶轮.,January 30, 2001 Inventory #001442 W9-18,9B. 选择叶轮拉伸,1.按教师指定的工作目录，用“impeller”作为作业名，进入ANSYS 。 2.恢复包含二维网格模型的数据库文件“impeller.db1” : Utility Menu File Resume from 选择文件名“impeller.db1”,按OK 或用命令: RESUME,impeller,db1 3.画出包含实体模型的单元: Utility Menu Plot Multi-Plots 或用命令: GPLOT,January 30, 2001 Inven

12、tory #001442 W9-19,9B. 选择叶轮拉伸,4.增加第2类单元类型 SOLID45 : Main Menu Preprocessor Element Type Add/Edit/Delete 按Add 选择“Structural Solid” 和 “Brick 8node 45”, 按OK 按Close Main Menu Preprocessor MeshTool 选择Global，按 Set 设置 TYPE = “2 SOLID45”, 然后按 OK 或用命令: /PREP7 ET,2,SOLID45 TYPE,2 5.定义拖拉选项，并沿线1拖拉所有的面: 5a.选择单元类

13、型2，用于拖拉: Main Menu Preprocessor -Modeling- Operate Extrude Elem Ext Opts 设置VAL1 = 2 按OK 或用命令: EXTOPT,ESIZE,2,January 30, 2001 Inventory #001442 W9-20,9B. 选择叶轮拉伸,5b.沿线1拖拉所有的面，并画单元: Main Menu Preprocessor -Modeling- Operate Extrude -Areas- Along Lines + 拾取Pick All 在ANSYS输入窗口键入 “1”并按 Enter 按OK Utility

14、Menu Plot Elements 或者用命令: EXTOPT,ESIZE,2 VDRAG,ALL,1 EPLOT,January 30, 2001 Inventory #001442 W9-21,9B. 选择叶轮拉伸,6.沿线2拖拉所有叶片表面 (面18)和内部2个圆环表面(面2) : 6a.设置单元分割数为9，用于拖拉: Main Menu Preprocessor -Modeling- Operate Extrude Elem Ext Opts 设置 VAL1 = 9 按OK 或用命令: EXTOPT,ESIZE,9 6b.选择Z=0.25平面上的所有面: Utility Menu S

15、elect Entities . 选择 “Areas”, “By Location”, 和 “Z coordinates” 设置 Min,Max = 0.25 按Apply 按Plot 或用命令: ASEL,S,LOC,Z,0.25 APLOT,January 30, 2001 Inventory #001442 W9-22,9B. 选择叶轮拉伸,6c.在Z=0.25的平面上选择 18 个叶片表面和2个圆环表面: Utility Menu Select Entities . 选择 “Areas”, “By Num/Pick”, and “Reselect” 按OK 选择 18 个叶片表面和2个圆环表面 按OK Utility Menu Plot Areas,January 30, 2001 Inventory #001442 W9-23,9B. 选择叶轮拉伸,6d.沿线2拖拉叶片和环的表面: Main Menu Preprocessor -Modeling- Operate Extrude -Areas- Along Lines + 拾取Pick All 在 ANSYS输入窗口中键入2，然后按Enter 按OK Utility Menu