combin39的使用（命令流）
刚接触combin39,想利用它模拟摩擦阻尼器。先做了一个很简单的例子想观察一下他的非线性，结果不管我的荷载怎么变，combin39式中处于弹性，命令流在下面，很简单的例子，希望各位前辈给点建议。fini
/clear
/filename,1
/title,1
/prep7
et,1,beam4
et,2,combin39
keyopt,2,1,1
keyopt,2,2,0
keyopt,2,4,0
keyopt,2,6,1
r,1,0.006,0.0002,0.00045,0.3,0.2
r,2,0,0,0.002,100,1,100
!5,250000,10,500000,20,500000
mp,ex,1,2.07e11
mp,prxy,1,0.3
n,1,1,1
n,2,1,4
n,3,5,4
n,4,5,1
type,1
real,1
mat,1
e,1,2
e,2,3
e,3,4
type,2
real,2
e,1,3
nsel,s,loc,y,1
d,all,all
allsel,all
fini
/solu
antype,static
f,3,fx,10
lswrite,1
f,3,fx,1000000000
lswrite,2
lssolve,1,2
fini 非线性弹簧本来就是一种弹性啊 不知道你说的什么
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