模态分析

/PREP7
L1=0.3
L2=0.35
W=0.15
H=0.005
ET,1,PLANE183
KEYOPT,1,3,3
R,1,h,  
MP,EX,1,2.1e11
MP,PRXY,1,0.3  
MP,DENS,1,7800
MP, ALPD, 1,0.9
MP, BETD, 1, 0.00002

MP,EX,2,1.5e11
MP,PRXY,2,0.3  
MP,DENS,2,7000
MP, ALPD, 2, 0.5
MP, BETD, 2, 0.000025

RECTNG,0,L1,0,W,
RECTNG,L1,L1+L2,0,W,
AGLUE,1,2
ESIZE,0.005,0,  
TYPE,   1   
MAT,       1
REAL,       1   
MSHAPE,0,2D
MSHKEY,1
AMESH,1
MAT, 2
AMESH,3
/SOL
ANTYPE,2
MODOPT,QRDAMP,6
MXPAND,6, , ,0  
LUMPM,0
PSTRES,0
MODOPT,QRDAMP,6,0,0,1,OFF   
DL,4, ,ALL,  
SOLVE