有限元分析上机指导书

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1、目录实验一车轮的实体建模与网格划分·············································3实验二自下向上实体建模（建立连杆模型）·····································6实验三平板结构的强度分析····················································10实验四轴承座的有限元建模与强度分析········································13实验五潜水艇的稳态热分析···········································

2、········19实验六管的热应力分析························································22实验七飞机机翼模型模态分析·················································25实验八质量弹簧系统谐响应分析··············································2918实验九板-梁结构的瞬态动力学分析···········································33实验十管道中流场的流体动力学分析·················

3、························3718实验一车轮的实体建模与网格划分一、实验目的：创建实体的方法，工作平面的平移及旋转，建立局部坐标系，模型的映射，拷贝，布尔运算（相减、粘接、搭接，基本网格划分。）二、问题描述：车轮为沿轴向具有循环对称的特性，基本扇区为45度，旋转8份即可得到整个模型。车轮内部A点所在线至圆心处为5,四个倒角处圆角半径0.25。三、具体步骤：1．建立切面模型建立三个矩形MainMenu:Preprocessor->-Modeling-Create->-Areas->-Rectangle->ByDimensions依次输入x1=5,x2=5.5,y1=0,y2

4、=5单击Apply再输入x1=5.5,x2=7.5,y1=1.5,y2=2.25单击Apply最后输入x1=7.5,x2=8.0,y1=0.5,y2=3.75单击OK将三个矩形加在一起MainMenu:Preprocessor->Modeling-Operate>Booleans-Add>Areas单击PickAll打开线编号UtilityMenu>PlotCtrls>Numbering线编号为ON，并选择/NUM为Colors&Numbers分别对线14与7；7与16；5与13；5与15进行倒角，倒角半径为0.25MainMenu:Preprocessor->Modeling-Create>

5、Lines-LineFillet拾取线14与7，单击Apply，输入圆角半径0.25，单击Apply；拾取线7与16，单击Apply，输入圆角半径0.25，单击Apply；拾取线5与13，单击Apply，输入圆角半径0.25，单击Apply；拾取线5与15，单击Apply，输入圆角半径0.25，单击OK；打开关键点编号UtilityMenu>PlotCtrls>Numbering关键点编号为ON，并选择/NUM为Colors&Numbers通过三点画圆弧MainMenu>Preprocessor>Create>Lines>Arcs>ByEndKPs&Rad18拾取12及11点，单击Apply，

6、再拾取10点，单击Apply，输入圆弧半径0.4,单击Apply;拾取9及10点，单击Apply，再拾取11点，单击Apply，输入圆弧半径0.4,单击OK由线生成面MainMenu:Preprocessor->-Modeling-Create->-Areas-Arbitrary>ByLines拾取线6、8、2单击Apply拾取线20、19、21单击Apply拾取线22、24、23单击Apply拾取线17、18、12单击Apply拾取线11、25单击Apply拾取线9、26单击OK将所以的面加在一起MainMenu:Preprocessor->Modeling-Operate>Booleans

7、-Add>Areas单击PickAll2．定义两个关键点（用来定义旋转轴）MainMenu>Preprocessor>Create>Keypoints-InActiveCSNPT输入50，单击ApplyNPT输入51，Y输入6，单击OK。3．面沿旋转轴旋转22.5度，形成部分实体MainMenu:Preprocessor->Operate-Extrude>Areas-AboutAxis拾取面单击A