ANSYS软件对悬臂梁的模态分析
ANSYS软件对悬臂梁的模态分析(1分题加分至6月30日)
一悬臂梁上中间位置处固定一物块,对其梁进行模态分析,梁为1m*0.01*0.01,ex=2e11,nuxy=0.3,dens=7.8e3,物块质
量0.5
请问如何进行建模及网格划分呢?
做法:
1.定义单元类型:types1: structural>beam>2d elastic3
type2: structural>mass>3d mass21,单击options在K3中选择2-D w/o rot inter
2.定义单元常数:preprocessor>real constants>add>type1>area:0.0001,IZZ:8.333E-11,HIGHT:0.01
Type2>0.5kg
3.定义材料属性:preprocessor>Material props>material model >structural>linear>elastic>isotropic>EX:2e11>0.3
structural>density >7830
4.定义关键点1:(0,0),2:(1,0)
5.建立直线
6.定义网格大小:preprocessor>meshing>size ctrls>manualsize>lines>all lines>0.01
7.划分网格:preprocessor>meshing>mesh>lines>pick all
8.定义单元:preprocessor>modeling>create>elements>attributes>element type number>选择2(mass21)
Real constant set no>选择2
9.创建单元:preprocessor>modeling>create>elements>auto numbered>thru nodes
10定义分析类型modal.
11.设置解选项:5,5
12.定义约束:固定关键点1
13.求解
14.查看特征频率及振型