如何在模态分析完后求阻尼值
怎么用GUI或是APDL编程在模态分析完以后,求解阻尼呢 没法求,请看看相关基础理论。 自己找书看吧,我没有做过。。。 回复 1 # +Allen+ 的帖子没法求的,知道阻尼求阻尼比还差不多。 阻尼似乎和材料微观结构和本身特性有关,所以应该没法球吧,阻尼一般通过实验法求 实验 法如何求呢 .
模态分析仅仅是计算固有频率和振型,结构的质量、弹性、阻尼等等都不是算出来的,质量、弹性、阻尼等都是通过实验得到,. . . 可以求模态阻尼比:用*get,e_damp,mode,2,damp 回复 8 # liu553322 的帖子
谢谢,我是做复合材料梁分析的,能不能给个类似的例子呀 /PREP7
MP,EX,1,2e11
MP,PRXY,1,0.3
MP,DENS,1,7800
MP,EX,2,1.92e8
MP,PRXY,2,0.3
MP,DENS,2,1050
MP,DAMP,2,0.5
ET,1, Solid95
Lb=205/1000
Wb=10/1000
Tb=2/1000
Ld=205/1000
Wd=10/1000
Td=2/1000
K,1,0,0,0.5*wb
K,2,Lb,0,0.5*wb
K,3,Lb,0,-0.5*wb
K,4,0,0,-0.5*wb
K,5,0,Tb,0.5*wb
K,6,Lb,Tb,0.5*wb
K,7,Lb,Tb,-0.5*wb
K,8,0,Tb,-0.5*wb
V,1,2,3,4,5,6,7,8
K,9,0,Tb+Td,0.5*wb
K,10,Lb,Tb+Td,0.5*wb
K,11,Lb,Tb+Td,-0.5*wb
K,12,0,Tb+Td,-0.5*wb
V,5,6,7,8,9,10,11,12
VGLUE,all
Type,1
Mat,1
LESIZE,1,,,NL
LESIZE,6,,,NL
LESIZE,3,,,NL
LESIZE,10,,,NL
LESIZE,2,,,NW
LESIZE,8,,,NW
LESIZE,12,,,NW
LESIZE,4,,,NW
VMESH,1
Type,1
Mat,2
LESIZE,14,,,NL
LESIZE,18,,,NL
LESIZE,16,,,NW
LESIZE,20,,,NW
VMESH,2
NSEL,S, LOC, x
D,all,all
ALLSEL,ALL
/SOLU
ANTYPE,MODAL
MODOPT,lanb,6
mXPAND, 6,,,YES
modopt,lanb,6,,,,off
!outpr,all
!outres,all
!/out,1,txt
SOLVE
/output,1,txt
finish
/post1
*get,e_pfact,mode,2,pfact
*get,e_damp,mode,2,damp
*status
页:
[1]