本帖最后由 lorcelong 于 2016-3-1 15:33 编辑
各位大侠,我用ansys教材上的算例做的工字钢屈曲分析,分析结果与书中不一致,主要是计算出来的2阶以后的特征值都是一样的,如下图,第一阶是一致的,命令如下。请各位指导下!!多谢!
命令行;
finish
/clear
/filname,I-beam
/title,buckling
/prep7
et,1,beam189
sectype,1,beam,I,,2
secoffset,cent
secdata,0.150,0.150,0.250,0.015,0.015,0.015,0,0,0,0
mp,dens,1,7.85e3
mp,ex,1,2.06e11
mp,nuxy,1,0.2
k,1,0.00,0.0,0.0
k,2,2.50,0.0,0.0
k,3,1.25,1.0,0.0
lstr,1,2
latt,1,,1,,3,,1
lesize,1,,,10
lmesh,1
/view,1,1,1,1
/ang,1
/rep,fast
/eshape,1.0
dk,1,,,,0,all,,,,,,
fk,2,fx,-1
finish
!特征值屈曲求解
/solu
antype,0
eqslv,sparse
prtres,on
solve
finish
/solu
antype,1
bucopt,lanb,6,0,0
mxpand,6,0,0,1,0.001,
solve
finish
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