Solidworks有限元分析教程学习课程

1、目目 录录企业企业需求需求与有限元分析与有限元分析 .3 有限元分析的主要步骤有限元分析的主要步骤 .3 COSMOS/Works 的的 用户界面用户界面 .3 COSMOS/Works 的工具条的工具条.8 COSMOS/Works 的选项对话框的选项对话框.9 COSMOS/Works 线性静力分析示例线性静力分析示例.13 线性静力分析：定义专题.13 线性静力分析：定义材料属性.14 线性静力分析：网格划分.30 线性静力分析：定义约束.42 线性静力分析：定义载荷.47 线性静力分析：求解.54 线性静力分析：观察结果.55 COSMOS/Works 模态分析示例模态分析示例.13

2、模态分析：定义专题.13 模态分析：定义材料属性.14 模态分析：网格划分.30 模态分析：定义约束.42 模态分析：定义载荷.47 模态分析：求解.54 模态分析：观察结果.55 COSMOS/Works 结构优化示例结构优化示例.13 结构优化：定义专题.71 结构优化：定义优化目标.72 结构优化：定义优化变量.73 结构优化：定义阀值函数.74 结构优化：求解.75 结构优化：观察结果.79 COSMOS/Works 温度分析示例温度分析示例 .13 温度分析：定义专题.13 温度分析：定义材料属性.14 温度分析：网格划分.30 温度分析：定义约束.42 温度分析：定义温度载荷.47

3、 温度分析：求解.54 温度分析：观察结果.55 COSMOS/Works 屈服分析示例屈服分析示例 .13 COSMOS/Works 应用技巧的总结应用技巧的总结.13 第1页/共30页第一页，编辑于星期六：二十一点 十九分。企业需求与有限元分析企业需求与有限元分析Design Analysis 更少的样机：省钱 更短的周期：省时 更好的质量：品质第2页/共30页第二页，编辑于星期六：二十一点 十九分。有限元分析的主要步骤有限元分析的主要步骤 前处理建立分析对象的有限元模型 求解对有限元模型的计算工况进行求解 后处理观察分析结果，评估设计是否符合要求第3页/共30页第三页，编辑于星期六：二十

4、一点 十九分。Cosmos/Works有限元分析的步骤有限元分析的步骤1.建立几何模型2.定义材料属性3.定义边界条件(约束和载荷)4.划分网格5.求解6.查看和评估结果修改, 重新, 细化第4页/共30页第四页，编辑于星期六：二十一点 十九分。Cosmos/Works的用户界面的用户界面第5页/共30页第五页，编辑于星期六：二十一点 十九分。Cosmos/Works的工具条的工具条定义、修改、删除专题定义材料生成有限元网格对当前专题进行计算在几何模型 / 有限元模型之间进行切换显示从所选的特征中选择面元第6页/共30页第六页，编辑于星期六：二十一点 十九分。Cosmos/Works的选项对话

5、框的选项对话框第7页/共30页第七页，编辑于星期六：二十一点 十九分。Cosmos/Works线性静力分析线性静力分析 例1.支座分析 例2.轴承载荷 例3.壳单元，静水压 例4.Motion，远端载荷第8页/共30页第八页，编辑于星期六：二十一点 十九分。线性静力分析：定义专题线性静力分析：定义专题 Displacement in the radial direction: Select “Axis1” and then define displacement plot in X-direction (radial to the axis). Select deformation scale

6、=1 Right-click on the displacement plot icon “plot2” and then select”List selected”Average displacement of “pole piece lower” = -0.0019504” (decrease in radius)Average displacement of “pole piece upper” = 0.007896 “ (increase in radius)Sum of these 2 displacement = 0.009846” Initial interfernce of 0

7、.01” Hoop Stress (tangential):Select “Axis1” and then define stress plot in Y-direction (radial to the axis). Select deformation scale=1 Right-click on the stress plot icon “plot2” and then select”List selected”Negative stress on “pole piece lower” (compression)Positive stress on “pole piece upper”

8、(tension)第9页/共30页第九页，编辑于星期六：二十一点 十九分。线性静力分析：定义材料属性线性静力分析：定义材料属性 Simulate parts which are separated by large gaps First run the model with small displacement option and look at the results If you see that there is a change in the orientation of the contact surfaces during loading or if the results do

9、esnt look realistic, use large deflection option第10页/共30页第十页，编辑于星期六：二十一点 十九分。线性静力分析：网格划分线性静力分析：网格划分 Open “RectangleGap.sldasm” Define a static study “smallcontact” Apply material “Alloy steel” to both parts Apply a pressure of 725 psi on the top face Select the two front faces and then apply restrai

10、nt. Select Flat face option and then select “Normal to face” Fix the left semi-circular face Hide the loads/bc symbols Define “Surface” contact between the top face of the bottom leg and the perpendicular face Create mesh and run Define a stress plot with scale factor = 1. Look at the contact surfac

11、e. 第11页/共30页第十一页，编辑于星期六：二十一点 十九分。线性静力分析：定义约束线性静力分析：定义约束 Define a new static study “LargeDisp” Dragn drop the material and loads/bc folders from “small contact” study Right-click on the study name and click on properties. Select “Large displacement contact” option. Run the analysis Define a stress pl

12、ot with scale factor = 1. Look at the contact area.第12页/共30页第十二页，编辑于星期六：二十一点 十九分。线性静力分析：定义载荷线性静力分析：定义载荷 Simulate heat resistance between parts for thermal analysis Account for heat resistance of thin parts without actually modeling them!Define thermal conductivity at the contact area to model the pr

13、operties of the glue between the chip and the substrate第13页/共30页第十三页，编辑于星期六：二十一点 十九分。线性静力分析：求解线性静力分析：求解 Open “Thermal contact resistance_transistor.sldasm” Explode the model and set preferred units to “SI” and temperature units to “Kelvin” Define a thermal study “NoRes” Apply material “AISI 304” for

14、 “Voltage regulator” and “Copper” for Heat sink Define “Surface” contact with No resistance between the contact faces Apply convection to all the faces of the model except the contact faces Film coefficient = 250 W/(m2.K) Bulk temperature = 298 K第14页/共30页第十四页，编辑于星期六：二十一点 十九分。线性静力分析：观察结果线性静力分析：观察结果 A

15、pply Heat power = 25 W for “Voltage regulator” Mesh with default settings and run the analysis Notice the temperature distribution of the heat sinkDistributed Resistance: Define a new thermal study “DistRes” Dragn drop “Material” folder and Loads/Bc folder from NoRes study to DistRes study Edit cont

16、act pair definition and define distributed resistance = 0.005 K.m2/W Total resistance = Distributed resistance X Contact area = 0.005 X 0.0003392 = 14.7 K/W Run the study “DistRes” Notice the temperature distribution of the heat sink第15页/共30页第十五页，编辑于星期六：二十一点 十九分。Thermal Contact Example (Contd) Probe

17、 the temperature value Define a thermal plot with mesh Right-click the plot icon and select Probe Pick all the nodes on the edge of both the parts Click on the Plot icon to view the temperature variation from the top face of the voltage regulator to the bottom of the heat sink 第16页/共30页第十六页，编辑于星期六：二

18、十一点 十九分。Thermal Contact Example (Contd)Total Resistance: Define a new thermal study “TotalRes” Dragn drop “Material” folder and Loads/Bc folder from NoRes study to TotalRes study Edit contact pair definition and define Total resistance = 25 K/W Run the study “TotalRes” Notice the temperature distrib

19、ution of the heat sink第17页/共30页第十七页，编辑于星期六：二十一点 十九分。Load Simulation: Remote Loads Remote Loads Direct Transfer Flexible surface Applied as equivalent force & moment Rigid Beam Rigid surface Remote Restraint Rigid connection Model effect of a rigid virtual part between two facesForce/Moment from

20、Motion Simulation at this point applied on the selected face第18页/共30页第十八页，编辑于星期六：二十一点 十九分。Remote Load Example Open “RemoteLoadExample.sldasm” Define a static study “Remote” Apply material “Alloy steel” Fix the flat face Select “Coordinate system1” and the end face of the cantilever. Define remote lo

21、ad of 10N in the X direction. Create mesh and run. Double-click on “Plot1” under the stress folder Animate the results Compare the plot results of “Remote” study with “Axial Tension” study第19页/共30页第十九页，编辑于星期六：二十一点 十九分。Motion Load Transfer Using Remote Loads Go to SW Add-in and click “COSMOS/Motion”

22、Open “LoadTransferModel_With_Result.sldasm” Play the animation and save the load file for frame # 300 Delete the motion results Go to CW menu, Import Motion Load and open this load file from “MotionLoadTransfer” directory Select all the loads related to crank-1 and then click OK. Open the part “cran

23、k” Youll see that there is a new study “Frame-300” with motion loads transferred as remote loads Apply material “Plain carbon steel” Go to study properties and select “FFEPlus” solver and “Inertia relief option” Run the analysis第20页/共30页第二十页，编辑于星期六：二十一点 十九分。Postprocessing: Results in local CS Plotti

24、ng Listings Reaction forces第21页/共30页第二十一页，编辑于星期六：二十一点 十九分。Postprocessing: Exploded views Plot results on SolidWorks exploded views第22页/共30页第二十二页，编辑于星期六：二十一点 十九分。Postprocessing: New tools Improved probing with graphing option List results by Entity第23页/共30页第二十三页，编辑于星期六：二十一点 十九分。Web Reports Inclusion

25、of report templates in the feature tree Saving of report setting Automatic creation of all plots第24页/共30页第二十四页，编辑于星期六：二十一点 十九分。Report Example Open “ReportExample.sldasm” New option save JPEG files (Right-click on the Study name) Right-click on Report and click define Point to the logo file “ReportLogo.bmp” Point to the right stress AVI and VRML files Select option “Automatically update all plots in JPEG files”. Click OK. You can also get a print version第25页/共30页第二十五页，编辑于星期六：二十一点 十九分。Material Supports orthotropic material properties for solids and shells Option to use different Material librar