PSD分析遇到的问题

wangzhanghui

下面是建模以后进行求解时的过程~其中的FLST以后一些语句是用来选择固定结点的~而模型是通过先用PLANE42离散面，然后通过soild45拉伸成体直接离散成规则的单元的，在求解时通过ESEL,U,TYPE,,1来不求解PLANE42单元。但正是这一步导致了求解PSD时的错误。
/SOLU   
!*  
ANTYPE,2
!*  
!*  
MODOPT,LANB,15  
EQSLV,SPAR  
MXPAND,15, , ,1
LUMPM,0
PSTRES,0
!*  
MODOPT,LANB,15,0,0, ,OFF
FLST,5,2,6,ORDE,2   
FITEM,5,60  
FITEM,5,-61
VSEL,S, , ,P51X
NSLV,S,1
FLST,2,648,1,ORDE,28
FITEM,2,424
FITEM,2,-425
FITEM,2,446
FITEM,2,-447
FITEM,2,468
FITEM,2,-469
FITEM,2,518
FITEM,2,-519
FITEM,2,760
FITEM,2,-913
FITEM,2,4942
FITEM,2,-4943   
FITEM,2,4964
FITEM,2,-4967   
FITEM,2,5008
FITEM,2,-5009   
FITEM,2,5030
FITEM,2,-5033   
FITEM,2,5074
FITEM,2,-5075   
FITEM,2,5096
FITEM,2,-5099   
FITEM,2,6160
FITEM,2,-6161   
FITEM,2,6182
FITEM,2,-6185   
FITEM,2,6886
FITEM,2,-7347   
!*  
/GO
D,P51X, ,0, , , ,ALL, , , , ,   
ALLSEL,ALL  
ESEL,U,TYPE,,1
/STATUS,SOLU
SOLVE
FINISH  
/SOLUTION   
ANTYPE,8
!*   
SPOPT,PSD,15,1  
PSDUNIT,1,ACCG,386.4,   
!*  
!*  
PSDFRQ,1, ,20,1000,4000,5000,   
PSDVAL,1,0.01,0.02,0.02,0.01,   
FLST,5,2,6,ORDE,2   
FITEM,5,60  
FITEM,5,-61
VSEL,S, , ,P51X
NSLV,S,1
FLST,2,648,1,ORDE,28
FITEM,2,424
FITEM,2,-425
FITEM,2,446
FITEM,2,-447
FITEM,2,468
FITEM,2,-469
FITEM,2,518
FITEM,2,-519
FITEM,2,760
FITEM,2,-913
FITEM,2,4942
FITEM,2,-4943   
FITEM,2,4964
FITEM,2,-4967   
FITEM,2,5008
FITEM,2,-5009   
FITEM,2,5030
FITEM,2,-5033   
FITEM,2,5074
FITEM,2,-5075   
FITEM,2,5096
FITEM,2,-5099   
FITEM,2,6160
FITEM,2,-6161   
FITEM,2,6182
FITEM,2,-6185   
FITEM,2,6886
FITEM,2,-7347   
D,P51X,UZ,1.0   
ALLSEL,ALL  
ESEL,U,TYPE,,1
PFACT,1,BASE,   
PSDRES,DISP,REL
PSDRES,VELO,REL
PSDRES,ACEL,REL
!*  
/STATUS,SOLU
SOLVE   
PSDCOM,0,15,
/STATUS,SOLU
SOLVE

wangzhanghui

回复 1 # wangzhanghui 的帖子

那位大哥大姐可以帮忙看看啊~怎么解决这个问题呢~将PLANE42进行求解就会导致模态的错误，也是不可行的