石油大学有限元ansys 练习9A选择.ppt

筒仓,练习 9A选择,January 30, 2001Inventory #001442W9-2,9A. 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, 2001Inventory #001442W9-3,9A. 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, 2001Inventory #001442W9-4,9A. 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, 2001Inventory #001442W9-5,9A. 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, 2001Inventory #001442W9-6,9A. 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,db13. 在 “选择实体” 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,0,120APLOT,January 30, 2001Inventory #001442W9-7,9A. 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 = “1 SHELL63”按[OK]或者用命令:AATT, 2, 1, 1,January 30, 2001Inventory #001442W9-8,9A. 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 all]设置MAT = 1设置REAL = 2设置TYPE = “1 SHELL63”按[OK]或者用命令:ASEL,S,PAPLOTAATT, 1, 2, 1,January 30, 2001Inventory #001442W9-9,9A. 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 “Areas”,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,-30APLOTAATT, 1, 3, 1,January 30, 2001Inventory #001442W9-10,9A. 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 > 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,-60,0LPLOTLATT, 1, 4, 2,January 30, 2001Inventory #001442W9-11,9A. 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,ALL,January 30, 2001Inventory #001442W9-12,9A. 选择筒仓,9. 选择全部实体，用SHELL63 单元划分面:Utility Menu > Select > EverythingUtility Menu > Plot > AreasMain 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,ALLAPLOTAMESH,ALL,January 30, 2001Inventory #001442W9-13,9A. 选择筒仓,10. 打开单元材料号并画单元:Utility Menu > PlotCtrls > Numbering ...Elem / Attrib numbering = “Material numbers”按[OK]或者用命令:/PNUM,MAT,1EPLOT,January 30, 2001Inventory #001442W9-14,9A. 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,1EPLOT,January 30, 2001Inventory #001442W9-15,9A. 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,dbFINISH/EXIT,NOSAVE,叶轮拖拉,练习 9B选择,January 30, 2001Inventory #001442W9-17,9B. 选择叶轮拉伸,说明通过选择, 把二维四边形网格的面拖拉为三维块体单元的叶轮.,January 30, 2001Inventory #001442W9-18,9B. 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,db13. 画出包含实体模型的单元:Utility Menu > Plot > Multi-Plots或用命令:GPLOT,January 30, 2001Inventory #001442W9-19,9B. 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:/PREP7ET,2,SOLID45TYPE,25. 定义拖拉选项，并沿线1拖拉所有的面:5a. 选择单元类型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, 2001Inventory #001442W9-20,9B. 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 Menu > Plot > Elements或者用命令:EXTOPT,ESIZE,2VDRAG,ALL,,,,,,1EPLOT,January 30, 2001Inventory #001442W9-21,9B. 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,96b. 选择Z=0.25平面上的所有面:Utility Menu > Select > 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,0.25APLOT,January 30, 2001Inventory #001442W9-22,9B. 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, 2001Inventory #001442W9-23,9B. 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 > Select > EverythingUtility Menu > Plot > Elements或用命令:VDRAG,ALL,,,,,,2ALLSEL,ALLEPLOT7. 存储网格模型并退出ANSYS:Utility Menu > File > Save as …输入数据库文件名“impeller-mesh.db” ,按 [OK]在工具条中拾取 “QUIT”选择 “Quit - No Save!”按[OK]或用命令:SAVE,impeller-mesh,dbFINISH $ /EXIT,NOSAVE,。