[求助]Ansys输流管耦合边界条件的加载
在Ansys中分析由流体和管道耦合产生的振动,进行模态分析和协响应分析时,由于边界条件是变化的,应如何确定?本人自己建立了一模型并求解了流固耦合的振动方程,不知如何导入到Ansys中进行计算,先在这里谢谢了!回复：（fnaaa）[求助]Ansys输流管耦合边界条件的加载...
/BATCH,LIST <BR>/PREP7 <BR>/TITLE,vibration of pipe with fluid in <BR><BR>!单元 <BR><BR>et,1,42,,,3 <BR>et,2,45 <BR>et,3,29 <BR>et,4,30,,0 ! structure present <BR>et,5,30,,1 ! structure absent <BR>r,1,0.0036 <BR><BR>!材料 <BR><BR>mp,ex,1,69e9 <BR>mp,dens,1,2700 <BR>MP,DENS,2,1030 <BR>MP,SONC,2,1460 <BR><BR>!建模、分网 <BR><BR>cyl4,,,0.0228,,0.0248 <BR>lesize,all,,,8 <BR>mshkey,2 <BR>mshape,0,2d <BR>aatt,1,,1 <BR>amesh,all <BR><BR>cyl4,,,0.0228 <BR>asel,s,,,2 <BR>lsla,s <BR>lesize,all,,,8 <BR>mshkey,0 <BR>mshape,0,2d <BR>aatt,2,,3 <BR>amesh,all <BR>allsel <BR><BR>!由面单元生成体单元 <BR><BR>asel,s,,,1 <BR>extopt,attr,1,1,1 <BR>extopt,esize,200 <BR>extopt,aclear,1 <BR>type,2 <BR>vext,all,,,,,0.849 <BR>allsel <BR>asel,s,,,2 <BR>extopt,attr,1,1,1 <BR>extopt,esize,200 <BR>extopt,aclear,1 <BR>type,4 <BR>vext,all,,,,,0.849 <BR>allsel <BR>nummerg,all <BR>!单元属性修改 <BR><BR>esel,s,type,,4 <BR>nsle,s,all <BR>csys,1 <BR>nsel,s,loc,x,0.0228 <BR>esln,s,0,all <BR>esel,inve <BR>nsle,s <BR>emodif,all,type,5 <BR>allsel <BR><BR>!流固耦合单元标识 <BR>nummrg,node <BR>csys,1 <BR>nsel,s,loc,x,0.0228 <BR>esln,s,type,,4<BR>sf,all,fsi,1 <BR>allsel <BR>finish <BR><BR>!模态计算 <BR><BR>/solu <BR>antype,2 <BR>modopt,unsym,20,0,10000 <BR>mxpand,20,0,10000 <BR>solv我按照这段命令流进行了计算，不过出现了问题
把命令流导入到ansys中以后进行计算，运算到模态分析时，出现了警告：没有足够的内存进行非线性计算，以前在计算时也曾经遇到过这样的情况，不过当时是因为自己的命令出现了问题，这段命令流不知道是不是经过了计算后得到的，所以想向你请教一下回复：（fnaaa）[求助]Ansys输流管耦合边界条件的加载...
这段命令流是别人调试过的，试着增大虚拟内存看看流固耦合
试了一下不通啊，请高手指点，我已困惑了好多天了流固耦合
<P><FONT size=5>上面的命令流一点不对吧,应为下面这样吧<BR></FONT><FONT size=3>!流固耦合单元标识 <BR>nummrg,node <BR>csys,1 <BR>nsel,s,loc,x,0.0228 <BR><FONT style="BACKGROUND-COLOR: #e6421a">esel,s,type,,4<BR></FONT>sf,all,fsi,1 <BR>allsel <BR>finish <BR><BR>请问楼主，为什么没有设置零位移约束呢，流体的压力自由度也要设吧？<BR>期盼回复欢迎交流ＱＱ３３０６３４３２７<BR></P></FONT>
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