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以下两个命令流区别仅在模型的尺寸不同(红色部分),为什么得到的振形不同?为什么尺寸小的,在阶梯过渡处的应力大,尺寸大的在阶梯过渡处应力小,相差百倍?尺寸小的对应的位移值大,尺寸大的对应的位移值小?模态分析的位移值是否有意义?
!第一个
/PREP7
ET,1,SOLID95
MP,DENS,1,7800
MP,EX,1,2e11
MP,prxy,1,0.3
K,1,,
K,2,0,0.029
K,3,0.055,0.029
K,4,0.055,0.009
K,5,0.110,0.009
K,6,0.110,0
L,1,2
L,2,3
L,3,4
L,4,5
L,5,6
L,6,1
A,1,2,3,4,5,6
VROTAT,1,,,,,,1,6,360
MSHAPE,1,3D
MSHKEY,0
VMESH,all
FINISH
/SOL
ANTYPE,2
MSAVE,0
MODOPT,LANB,10
EQSLV,SPAR
MXPAND,10, , ,1
LUMPM,0
PSTRES,0
MODOPT,LANB,10,15000,40000, ,OFF
/STATUS,SOLU
SOLVE
FINISH
!第二个
/PREP7
ET,1,SOLID95
MP,DENS,1,7800
MP,EX,1,2e11
MP,prxy,1,0.3
K,1,,
K,2,0,29
K,3,55,29
K,4,55,9
K,5,110,9
K,6,110,0
L,1,2
L,2,3
L,3,4
L,4,5
L,5,6
L,6,1
A,1,2,3,4,5,6
VROTAT,1,,,,,,1,6,360
MSHAPE,1,3D
MSHKEY,0
VMESH,all
FINISH
/SOL
ANTYPE,2
MSAVE,0
MODOPT,LANB,10
EQSLV,SPAR
MXPAND,10, , ,1
LUMPM,0
PSTRES,0
MODOPT,LANB,10,15000,40000, ,OFF
/STATUS,SOLU
SOLVE
FINISH |