ANSYS静力分析实例

1. 问题描述：

这是一个关于角支架的单载荷步的结构静力分析。如下图，左上角的销孔由于焊接而被固定死。右下角的销孔上作用一散布力。本问题的目标是熟悉ANSYS分析的大体进程。利用的是美国的单位体系。

材料的杨氏模量为30E6 psi，泊松比。

2. 几何建模：

第一步：概念矩形

1. Main Menu> Preprocessor> Modeling> Create> Areas> Rectangle> By Dimensions

2. Enter the following:

X1 = 0 ,X2 = 6,Y1 = -1,Y2 = 1 3. Apply to create the first rectangle. 4. Enter the following:

X1 = 4,X2 = 6,Y1 = -1,Y2 = -3

5. OK to create the second rectangle and close the dialog box.

第二步：更改画图属性和重绘。

1. Utility Menu> Plot Ctrls> Numbering 2. Turn on area numbers.

3. OK to change controls, close the dialog box, and replot.

4. Toolbar: SAVE_DB.

第三步：更改工作平面为极坐标系并创建第一个圆

1. Utility Menu> WorkPlane> Display Working Plane (toggle on) 2. Utility Menu> WorkPlane> WP Settings 3. Click on Polar.

4. Click on Grid and Triad. 5. Enter for snap increment.

6. OK to define settings and close the dialog box.

7. Main Menu> Preprocessor> Modeling> Create> Areas> Circle> Solid Circle

8. Pick center point at:WP X = 0，WP Y = 0

9. Move mouse to radius of 1 and click left button to create circle. 10.OK to close picking menu.

11.Toolbar: SAVE_DB.

第四步：移动工作平面并创建第二个圆

1. Utility Menu> WorkPlane> Offset WP to> Keypoints 2. Pick keypoint at lower left corner of rectangle. 3. Pick keypoint at lower right of rectangle. 4. OK to close picking menu.

5. Main Menu> Preprocessor> Modeling> Create> Areas> Circle> Solid Circle

6. Pick center point at:WP X = 0，WP Y = 0

7. Move mouse to radius of 1 and click left button to create circle. 8. OK to close picking menu.

9. Toolbar: SAVE_DB.

第五步：增加面

1. Main Menu> Preprocessor> Modeling> Operate> Booleans> Add> Areas 2. Pick All for all areas to be added. 3. Toolbar: SAVE_DB.

第六步：创建线倒角

1. Utility Menu> PlotCtrls> Numbering 2. Turn on line numbering.

3. OK to change controls, close the dialog box, and automatically replot.

4. Utility Menu> WorkPlane> Display Working Plane (toggle off) 5. Main Menu> Preprocessor> Modeling> Create> Lines> Line Fillet 6. Pick lines 17 and 8.

7. OK to finish picking lines (in picking menu). 8. Enter as the radius.

9. OK to create line fillet and close the dialog box. 10.Utility Menu> Plot> Lines

第七步：创建倒角面

1. Utility Menu> PlotCtrls> Pan, Zoom, Rotate 2. Click on Zoom button.

3. Move mouse to fillet region, click left button, move mouse out and click again.

4. Main Menu> Preprocessor> Modeling> Create> Areas> Arbitrary> By Lines

5. Pick lines 4, 5, and 1.

6. OK to create area and close the picking menu. 7. Click on Fit button.

8. Close the Pan, Zoom, Rotate dialog box. 9. Utility Menu> Plot> Areas

10.Toolbar: SAVE_DB.

第八步：将面添加到一路

1. Main Menu> Preprocessor> Modeling> Operate> Booleans> Add> Areas 2. Pick All for all areas to be added. 3. Toolbar: SAVE_DB.

第九步：创建第一个销孔

1. Utility Menu> WorkPlane> Display Working Plane (toggle on) 2. Main Menu> Preprocessor> Modeling> Create> Areas> Circle> Solid Circle

3. Pick center point at: WP X = 0，WP Y = 0

4. Move mouse to radius of .4 (shown in the picking menu) and click left button to create circle. 5. OK to close picking menu.

第十步：移动工作平面并创建第二个销孔

1. Utility Menu> WorkPlane> Offset WP to> Global Origin

2. Main Menu> Preprocessor> Modeling> Create> Areas> Circle> Solid Circle

3. Pick center point at: WP X = 0，WP Y = 0

4. Move mouse to radius of .4 (shown in the picking menu) and click left mouse button to create circle. 5. OK to close picking menu.

6. Utility Menu> WorkPlane> Display Working Plane (toggle off) 7. Utility Menu> Plot> Replot 8. Utility Menu> Plot> Lines

9. Toolbar: SAVE_DB.

第十一步：从支架上减掉销孔

1. Main Menu> Preprocessor> Modeling> Operate> Booleans> Subtract> Areas

2. Pick bracket as base area from which to subtract. 3. Apply (in picking menu).

4. Pick both pin holes as areas to be subtracted. 5. OK to subtract holes and close picking menu.

3. 概念材料：

第十二步：设置分析类型

1. Main Menu> Preferences

2. Turn on structural filtering.

3. OK to apply filtering and close the dialog box.

第十三步：概念材料属性

1. Main Menu> Preprocessor> Material Props> Material Models 2. Double-click on Structural, Linear, Elastic, Isotropic. 3. Enter 30e6 for EX. 4. Enter .27 for PRXY.

5. OK to define material property set and close the dialog box. 6. Material> Exit

第十四步：概念单元类型和选项

1. Main Menu> Preprocessor> Element Type> Add/Edit/Delete 2. Add an element type.

3. Structural solid family of elements. 4. Choose the 8-node quad ().

5. OK to apply the element type and close the dialog box. 6. for are to be defined.

7. Choose plane stress with thickness option for element behavior. 8. OK to specify options and close the options dialog box. 9. Close the element type dialog box.

第十五步：概念实常数(什么是实常数？)

1. Main Menu> Preprocessor> Real Constants> Add/Edit/Delete 2. Add a real constant set. 3. OK for .

4. Enter .5 for THK.

5. OK to define the real constant and close the dialog box. 6. Close the real constant dialog box.

4. 划分网格：

第十六步：面网格划分

1. Main Menu> Preprocessor> Meshing> Mesh Tool 2. Set Global Size control. 3. Type in . 4. OK.

5. Choose Area Meshing. 6. Click on Mesh.

7. Pick All for the area to be meshed (in picking menu). Close any warning messages that appear. 8. Close the Mesh Tool.

5. 施加载荷：

第十七步：施加位移约束

1. Main Menu> Solution> Define Loads> Apply> Structural> Displacement> On Lines

2. Pick the four lines around left-hand hole (Line numbers 10, 9, 11, 12).

3. OK (in picking menu). 4. Click on All DOF.

5. Enter 0 for zero displacement.

6. OK to apply constraints and close dialog box. 7. Utility Menu> Plot Lines

8. Toolbar: SAVE_DB.

第十八步：施加散布力

1. Main Menu> Solution> Define Loads> Apply> Structural> Pressure> On Lines

2. Pick line defining bottom left part of the circle (line 6). 3. Apply.

4. Enter 50 for VALUE.

5. Enter 500 for optional value.

6. Apply.

7. Pick line defining bottom right part of circle (line 7). 8. Apply.

9. Enter 500 for VALUE.

10.Enter 50 for optional value. 11.OK.

12.Toolbar: SAVE_DB.

6. 求解：

第十九步：求解

1. Main Menu> Solution> Solve> Current LS 2. Review the information in the status window, then choose File> Close 3. OK to begin the solution. Choose Yes to any Verify messages that appear.

4. Close the information window when solution is done.

7. 查看结果：

第二十步：读入数据结果

1. Main Menu> General Postproc> Read Results> First Set

第二十一步：绘制变形图

1. Main Menu> General Postproc> Plot Results> Deformed Shape 2. Choose Def + undeformed. 3. OK.

4. Utility Menu> Plot Ctrls> Animate> Deformed Shape 5. Choose Def + undeformed. 6. OK.

第二十二步：绘制应力图

1. Main Menu> General Postproc> Plot Results> Contour Plot> Nodal Solu 2. Choose Stress item to be contoured.

3. Scroll down and choose von Mises (SEQV). 4. OK.

5. Utility Menu> Plot Ctrls> Animate> Deformed Results 6. Choose Stress item to be contoured.

7. Scroll down and choose von Mises (SEQV). 8. OK. 9. Make choices in the Animation Controller (not shown), if necessary, then choose Close.

第二十三步：列出约束反力

1. Main Menu> General Postproc> List Results> Reaction Solu 2. OK to list all items and close the dialog box. 3. Scroll down and find the total vertical force, FY. 4. File> Close (Windows).

第二十四步：退出ANSYS软件

1. Toolbar: Quit.

2. Choose Quit - No Save! 3. OK.