ANSYS有限元分析课程论文

1、题目：3 如图所示是一飞轮的截面图。飞轮材料的弹性模量 210GPa,泊松比0.27,密度7800kg/m。飞轮的角速度为 62.8rad/s，飞轮边缘受到压力作用，压力p为1MPa，飞轮轴孔固定。试对飞轮进行静力分析并绘制飞轮在柱坐标系下径向、环向的应力和变形云图。主要步骤:1. 用户自定义文件夹，以为文件名xiti开始一个新的分析。2. 定义单元类型(1) 选择 Main MenuPreprocessorElement TypeAdd/Edit/DeleteAdd select : select Solid Quad 8node 82 OK (back to Eleme nt Types

2、win dow)(2) 设置 Solid Quad 8node 82 的 Options 选项，Options selelt K3: AxisymmetricClose (the Element Type window)，如图 1 所示。图1单元属性设置对话框3. 定义材料性能参数(1) 定义材料的弹性模量和泊松比MainMenu:PreprocessorMaterialPropsMaterialModels Structural Linear Elastic Isotropic input EX:2.10e5, PRXY:0.27 OK(2) 定义材料的密度Main Menu: Prepro

3、cessor Material Props MaterialModelsFavoriteL in earStaticDe nsity in put DENS:0.0078 OK4. 建立几何模型、划分网格(1) 生成特征点Main MenuPreprocessorModelingCreateKeypointslnActive CS依次输入点的坐标：input:1(50,0),2(55,0),3(55,16), 4(75,16), 5(75,5),6(80,5),7(80,40),8(75,40), 9(75,24),10(55,24),11(55,50),12(50,50)(2) 连接各特征点

4、Main MenuPreprocessorModelingCreateLinesLinesStraight Line 依次连接各特征点：1(50,0),2(55,0),3(55,16), 4(75,16), 5(75,5),6(80,5),7(80,40),8(75,40), 9(75,24),10(55,24),11(55,50),12(50,50)(3) 生成过度圆弧Main MenuPreprocessorModelingCreateLinesLineFillet 选择需要产生过度圆弧的两边，输入过度圆弧的半径OK如图2所示。PTiIMTAIMHAY 31 2013S.；S1；55图2飞

5、轮截面形状(4) 生成飞轮截面Main MenuPreprocessorModelingCreateAreasArbitraryBylines 依次选择各ANBAT 31CB:Z:条线OK如图3所示。ivrs rruii1 n7图3飞轮截面模型5. 网格划分Main MenuPreprocessorMeshing Mesh Tool ( Size Controls) Global:Set in put SIZE:1 OKMesh Tool Mesh : select Areas Shape:QuadFree Mesh Pick All Close( theWord文档Mesh Tool win

6、dow) 如图 4 所示。图4飞轮网格划分模型rSFLFBE5 *討ag a6. 模型约束加载(1) 对飞轮边施加位移约束Main Menu Soluti on Defi ne Loads Apply Structural Displaceme nt On Lines 拾取左边 OK select Lab2:ALL DOF OK(2)对飞轮边施加载荷Main Men uSolution Defi ne Loads Apply Structural Pressure On Li nes 选择图 示的三条边 如下图5输入OKH Appl-y PKES bm 丄丄肮ohI Ccn.3 1-an.IL

7、 value tlieiv:时ALUE Lg竝 PRESI f 匚smtne *0jli uiiul FEIH臣l 曰皿 J uf IIiluQe awe blaiLk oi uxu. forn* PRES )Vialiia图5飞轮边施加载荷(3) 施加角速度ANSYS Main Menu: Solution Define Loads Apply Structural 1 nertia Angularveloc Globel弹出施加角速度的对话框，如图6输入图6施加角速度7. 分析计算Main MenuSolution Solve Current LS OK(to close the solv

8、e Current Load Step wi ndow) OK8. 后处理（i）改变观察结果输出坐标系Ma in Menu: Ge neral Postproc Optio ns for Output 出现结果坐标系设置对话对话框，设置为柱坐标系，如图7所示。图7改变观察坐标系(2)三维扩展弹出轴对称扩展Utility Men uPlotCtrlsStyleSymmetry Expa nsio n2D Axis-Symmertric设置对话框，选择 Full expansion单击OK9. 结果显示(1)径向应力云图Main MenuGeneral Postproc Plot Results

9、Contour Plot Nodal Solu select: DOFsoluti on, X-Comp onent of displaceme nt OKETAY = 1rxIIA.VC：)DTJf 二.003437 一謝M -.OOJ3Z；-.C33ZZ一-OD聒今DO11D73BE-D3口-u0CX114-u7I71-Ci!.1C7I-3INWAX SOUrrri r(5TTF-1SIT -1/IXFANDED UXIAVGIPST5-1DJtX *.0C3-iH7 倔QD屈S 吕貫苫=.35E-0=：图8平面径向应力云图ANEC.T SL 2013Hl OS 1:34QiHlW图9三维径向应力云图(2) 环向向应力云图Main Menu:General Postproc Plot Results Contour Plot Nodal Solu select: DOFsoluti on, Y-Comp onent of displaceme nt OK图10环向应力云图fJDLUTICftTEr-i SCB -t TlfiZL-75E-O3tQC15aQL23-50-OOil QOZ7I2 3 2 -?E OJ.DI162.Din：! DDH87图11三维环