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ANSYS中模拟结构碰撞命令流  

2010-04-21 14:43:30|  分类: 地震碰撞 |  标签: |举报 |字号 订阅

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在地震作用下,相邻结构因为间距不足等原因而发生,给结构带来严重的破坏。碰撞是一个复杂的非线性问题,模拟结构碰撞的方法一般采用接触单元法,通常采用的软件有DRAIN、Sap2000、OpenSees、ANSYS等,当然做这样的非线性分析OpenSees是最佳的选择,但它在中国运用不够广泛,再加上他不可视化的界面,很多人都不选择用OpenSees。北京交通大学朱晞老先生的几个弟子曾用ANSYS做过这方面的分析,主要是用COMBIN单元模拟接触单元的刚度、间隙、阻尼等。

finish
/clear
/filname model
/PREP7
/title,pengzh

!建立单元类型
ET,1,BEAM3
ET,2,BEAM23
ET,3,COMBIN14
ET,4,COMBIN39
ET,5,COMBIN40
ET,6,COMBIN14
et,7,combin40
!单元类型选项
KEYOPT,1,6,1
KEYOPT,1,9,0
KEYOPT,1,10,0
!*
KEYOPT,2,2,1
KEYOPT,2,4,l
KEYOPT,2,6,0
KEYOPT,2,10,0
!*
KEYOPT,3,1,0
KEYOPT,3,2,1
KEYOPT,3,3,0
!*
KEYOPT,4,1,1
KEYOPT,4,2,0
KEYOPT,4,3,0
KEYOPT,4,4,0
KEYOPT,4,6,0
!*
KEYOPT,5,1,0
KEYOPT,5,3,0
KEYOPT,5,4,0
KEYOPT,5,6,1
!*
KEYOPT,6,1,0
KEYOPT,6,2,6
KEYOPT,6,3,0
!
KEYOPT,7,1,0
KEYOPT,7,3,0
KEYOPT,7,4,0
KEYOPT,7,6,2
!定义实常数
R,l,4.8996,1.4879,1.6,0,0,18000,!梁
R,2,9.88,2.972,1.9,!高墩
R,3,14.82,4.4584,1.9,
R,4,21.56,8.6959,2.2,
R,5,6.24,0.748802,1.2,!低墩
R,6,9.36,1.1232,1.2,
R,7,21.56,8.6959,2.2,
R,8,1e7,0,0,!橡胶支座
R,9,0,0,0.004703,48912.633,0.275,48912.633,!滑板支座
R,10,0,0,0,0.06,0,10393000000,!梁缝接触
R,1l,5e9,,, !土弹簧
R,12,0,0,0,0.06,0,391000000,!梁台接
R,13,0,0,0,0.60,0,391000000,!梁台接触
!定义材料
MP,EX,1,3.5e10
MP,PRXY,1,0.1667
MP,DENS,1,2500

MP,DENS,2,2500
mp,ex,2,3e10
MP,PRXY,2,0.1667
!墩身材料非线性
MP,EX,3,,3e10
MP,PRXY,3,,0.3
MP,DENS,3,,2500

TB,kinh,2,l,4
TBTEMP,0,,
TBPT,,0,0
TBPT,,0.00044048,1.23e7
TBPT,,0.002,1.67e7
TBPT,,0.0035,1.67e7

!建立模型
k,1,0,0,0
k,2,0,14,0
k,3,0,14.9,0
k,4,0,15.5,0
k,5,0,15.5,0
k,6,0,15.5,0
k,7,16.5,15.5,0

k,8,16.5,15.5,0
k,9,16.5,15.5,0
k,10,16.5,15.5,0
k,11,16.5,14.9,0
k,12,16.5,14,0
k,13,16.5,6,0
k,14,33,15.5,0
lstr,1,2
lstr,2,3
lstr,3,4
lstr,5,7
lstr,6,8
lstr,9,14
lstr,10,11
lstr,11,12
lstr,12,13
lsel,s,,,4,6,1
latt,1,l,1
lesize,4,,,28,,,,,1
lesize,5,,,28,,,,,1
lesize,6,,,28,,,,,1
lsel,s,,,1
latt,2,2,1
lesize,1,,,28,,,,,1
lsel,s,,,2
latt,2,3,1
lesize,2,,,2,,,,,1
lsel,s,,,3
latt,2,4,1
lesize,3,,,1,,,,,1
lsel,s,,,7
latt,2,7,1
lesize,7,,,1,,,,,1
lsel,s,,,8
latt,2,6,1
lesize,8,,,2,,,,,1
lsel,s,,,9
latt,2,5,1
lesize,9,,,28,,,,,1
allsel,all
lmesh,all
!定义补充节点
n,152,-16.5,15.5,0
n,153,33,15.5,0
n,154,0,0,0
n,155,16.5,6,0
n,156,-16.5,15.5,0
n,157,33,15.5,0
!定义版式橡胶支座}
type,3
real,8
e,32,33
e,120,63
e,153,92
!定义滑板支座
type,4
real,9
e,152,34
e,32,62
e,120,91
!定义梁缝接触单元
type,5
real,10
e,62,33
e,91,63
!定义土弹簧
type,6
real,11
e,154,1
e,155,124
!定义0#梁台接触单元
type,7
real,12
e,156,34
!定义3#梁台接触单元
type,7
real,13
e,157,92
!定义约束条件
cp,1,uy,152,34,156,
cp,2,uy,32,33,62,
cp,3,uy,120,63,91
cp,4,uy,153,92,157,
d,1,ux
d,1,uy
d,124,ux
d,124,uy
d,152,all
d,153,all
d,154,rotz
d,155,rotz
d,156,all
d,157,all
SAVE
FINISH


摘录自文献:

孟宪锋.地震作用下高速铁路简支梁桥梁间碰撞及防止措施的研究[D].北京:北京交通大学,2005

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