简单例子说明阻尼模态的分析
<DIV >主要注意的就是要用damp分析，否则阻尼将被忽略 <BR>而且扩展模态一定要设置 <BR><BR>/clear,start <BR>/prep7 <BR>et,1,combin14 <BR>et,2,mass21 <BR>r,1,1000,100 <BR>r,2,10,10,10 <BR>n,1,0 <BR>n,2,1 <BR>n,3,2 <BR>n,4,3 <BR>type,1 <BR>real,1 <BR>e,1,2 <BR>e,2,3 <BR>e,3,4 <BR>type,2 <BR>real,2 <BR>e,2 <BR>e,3 <BR>d,1,,,,,,ux,uy,uz,rotx,roty,rotz <BR>d,4,,,,,,ux,uy,uz,rotx,roty,rotz <BR>d,2,,,,,,uz,uy,,rotx,roty,rotz <BR>d,3,,,,,,uz,uy,,rotx,roty,rotz <BR>/solu <BR>antype,modal <BR>modopt,damp,2 <BR>MXPAND,1, , ,0 <BR>solve <BR>finish</DIV><!-- / message --><BR>
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