【原创】变截面梁的定义

feng2008

我才开始接触ANSYS，希望大家多多指教啊
想知道的是用图形界面入手好，还是输命令对学习的更好些

kulongcoco

我怎么看不了?

天山飞鹰

真是的，我只会GUI的方式使用ANSYS。

变截面梁用CAD软件做不行吗？CAD可以做更复杂的东西。

chunliangzhou

很想看看变截面梁的有关知识，但无奈没有积分，交流不了了，为什么要加积分限制呢？

libin26

原创 :最近刚完成自己的论文模型部分,变截面梁模拟实际桥梁.
以下为建模的一段命令流:
/prep7  
/title,the analyse of the 3rd Bridge  
et,1,plane82
*do,i,1,54,1
  *if,i,le,25,then
    xp=i*3/2
  *elseif,i,le,53,then
    xp=25*3/2+(i-25)*4/2
  *else
    xp=94.5
  *endif
  height=(8/94.5**1.5)*(94.5-xp)**1.5+3.57
  tb=1.2-0.0093122*xp
  *if,i,le,24,then
    tw=0.7
  *elseif,i,le,42,then
    tw=0.6
  *else
    tw=0.5
  *endif
  x1=7.0/2-tw-1.5
  x2=7.0/2-tw
  x3=7.0/2-tw-1.0
  k,1,-x1,x1*0.02,0
  k,2,-x2,x2*0.02,0
  k,3,-3.5,0.07,0
  k,4,-5,0.1,0
  k,5,-6.7,0.134,0
  k,6,-6.7,-0.016,0
  k,7,-5,-0.2,0
  k,8,-3.5,-0.73,0
  k,9,-x2,x1*0.02-0.3-0.47,0
  k,10,-x1,x1*0.02-0.3,0
  k,11,-3.5,-(height-tb-0.5),0
  k,12,-x2,-(height-tb-0.5),0
  k,13,-x3,-(height-tb),0
  k,14,-x3,-height,0
  k,15,-x2,-height,0
  k,16,-3.5,-height,0
  k,21,x1,-x1*0.02,0
  k,22,x2,-x2*0.02,0
  k,23,3.5,-0.07,0
  k,24,5,-0.1,0
  k,25,6.7,-0.134,0
  k,26,6.7,-0.284,0
  k,27,5,-0.4,0
  k,28,3.5,-0.87,0
  k,29,x2,-0.30-x1*0.02-0.53,0
  k,30,x1,-0.30-x1*0.02,0
  k,31,3.5,-(height-tb-0.5),0
  k,32,x2,-(height-tb-0.5),0
  k,33,x3,-(height-tb),0
  k,34,x3,-height,0
  k,35,x2,-height,0
  k,36,3.5,-height,0
!
  *do,ip,1,4,1
    a,ip,11-ip,10-ip,ip+1
    a,20+ip,20+11-ip,20+10-ip,20+ip+1
  *enddo
  a,1,21,30,10
  a,8,9,12,11
  a,11,12,15,16   
  a,12,13,14,15   
  a,28,31,32,29   
  a,31,36,35,32   
  a,32,35,34,33   
  a,13,33,34,14   
  esize,,1
  amesh,all   
  secwrite,girder%i%,sect,,1
  sectype,1000+i,beam,mesh
  secoffset,cent !坐标放在节点上
  secread,girder%i%,'sect',,mesh
  aclear,all
  adele,all,,,1  
*enddo
!define the section of 0# segment
k,1,-0.8003,0.016,0
k,2,-2.3,0.046,0
k,3,-3.5,0.07,0
k,4,-5,0.1,0
k,5,-6.7,0.134,0
k,6,-6.7,-0.016,0
k,7,-5,-0.2,0
k,8,-3.5,-0.73,0
k,9,-2.3,-0.7542,0
k,10,-0.8003,-0.4841,0
k,11,-3.5,-9.57,0
k,12,-2.3,-9.57,0
k,13,-1.3,-10.07,0
k,14,-1.3,-11.57,0
k,15,-2.3,-11.57,0
k,16,-3.5,-11.57,0
k,21,0.8003,-0.016,0
k,22,2.3,-0.046,0
k,23,3.5,-0.07,0
k,24,5,-0.1,0
k,25,6.7,-0.134,0
k,26,6.7,-0.284,0
k,27,5,-0.4,0
k,28,3.5,-0.87,0
k,29,2.3,-0.8462,0
k,30,0.8003,-0.5161,0
k,31,3.5,-9.57,0
k,32,2.3,-9.57,0
k,33,1.3,-10.07,0
k,34,1.3,-11.57,0
k,35,2.3,-11.57,0
k,36,3.5,-11.57,0
*do,ip,1,4,1
  a,ip,11-ip,10-ip,ip+1
  a,20+ip,20+11-ip,20+10-ip,20+ip+1
*enddo
a,1,21,30,10
a,8,9,12,11
a,11,12,15,16   
a,12,13,14,15   
a,28,31,32,29   
a,31,36,35,32   
a,32,35,34,33   
a,13,33,34,14   
esize,,1
amesh,all   
secwrite,girder0,sect,,1
sectype,1000,beam,mesh
secoffset,origin
secread,girder0,'sect',,mesh
aclear,all
adele,all,,,1  
!define the section of the main pier
rectng,-3.5,3.5,-1.25,1.25  
cyl4,2.9234375,0,1.3765625,65.23848614,,-65.23848614
cyl4,-2.9234375,0,1.3765625,114.76151386,,-114.76151386+360
aadd,all
esize,1
smartsize,5
amesh,all   
secwrite,pier0,sect,,1
sectype,500,beam,mesh
secoffset,origin
secread,pier0,'sect',,mesh
aclear,all
adele,all,,,1  
!
etdele,1
et,1,beam188
et,2,beam44
keyopt,1,1,1
keyopt,1,2,0
keyopt,1,3,1
keyopt,1,4,2
keyopt,1,6,2
keyopt,1,7,2
keyopt,1,8,2
keyopt,1,9,2

!50# concrete
mp,ex,1,3.5e10
mp,dens,1,2600
mp,prxy,1,0.1667
MP,alpx,1,1.0e-5
!40# concrete
mp,ex,2,3.3e10
mp,dens,2,2600
mp,prxy,2,0.1667
MP,alpx,2,1.0e-5
*dim,coorx,array,245
*dim,coory,array,245
*vread,coorx,coor1,dat
(f8.3)
*vread,coory,coor2,dat
(f8.3)
*do,i,1,245,1
  n,i,coorx(i),0.0,0.0
*enddo
n,10000,0,50
!0# segment
r,1000
real,1000
secnum,1000
*do,i,61,68,1
  e,i,i+1,10000
  e,i+116,i+117,10000
*enddo
!
r,1
real,1
secnum,1054
*do,i,1,6,1
  e,i,i+1,10000
*enddo
!
*do,i,7,60,1
  r,i
  real,i
  sectype,i,taper
  secdata,1001+(60-i),coorx(i),0,0
  secdata,1000+(60-i),coorx(i+1),0,0
  secnum,i
  e,i,i+1,10000
*enddo
!
*do,i,69,122,1
  r,i
  real,i
  sectype,i,taper
  secdata,1000+(i-69),coorx(i),0,0
  secdata,1001+(i-69),coorx(i+1),0,0
  secnum,i
  e,i,i+1,10000
*enddo
!
*do,i,123,176,1
  r,i
  real,i
  sectype,i,taper
  secdata,1001+(176-i),coorx(i),0,0
  secdata,1000+(176-i),coorx(i+1),0,0
  secnum,i
  e,i,i+1,10000
*enddo
!
*do,i,185,238,1
  r,i
  real,i
  sectype,i,taper
  secdata,1000+(i-185),coorx(i),0,0
  secdata,1001+(i-185),coorx(i+1),0,0
  secnum,i
  e,i,i+1,10000
*enddo
r,301
real,301
secnum,1054
*do,i,239,244,1
  e,i,i+1,10000
*enddo
!2#pier & 3# pier
!type,2
mat,2
n,500,105.75,-11.5+105.75*0.005,0
n,511,105.75,-49.56+105.75*0.005,0
n,550,114.25,-11.5+114.25*0.005,0
n,561,114.25,-11.5-38.10+114.25*0.005,0
n,600,305.75,-11.5+305.75*0.005,0
n,611,305.75,-11.5-45.61+305.75*0.005,0
n,650,314.25,-11.5+314.25*0.005,0
n,661,314.25,-11.5-45.65+314.25*0.005,0
fill,500,511
fill,550,561
fill,600,611
fill,650,661
r,500
real,500
secnum,500
*do,i,500,510,1
  e,i,i+1,1
  e,i+50,i+51,1
  e,i+100,i+101,1
  e,i+150,i+151,1
*enddo
csys,0
/eshape,1
eplot
d,511,all
d,561,all
d,611,all
d,661,all
d,1,uy,,,,,uz,rotx
d,245,uy,,,,,uz,rotx
cerig,62,500,all
cerig,68,550,all
cerig,178,600,all   
cerig,184,650,all   
allsel,all
nummrg,all
numcmp,all
etcontrol,set,
esel,r,mat,,2
cm,piere,elem
nsle,s
cm,piern,node
allsel,all

hemanzi

谢谢各位了，很有帮助。

wlbnum1

都是前辈，学到了不少！！

wuhaiyu9713

我怎么看不了？

ygbj

太好了!!!

abin426

谢谢了,多学习学习

hyjhfx

不错不错!

dongds

怎么看不见呢

mastery001

想知道变截面的实常数是怎么具体定义的。谢谢

xiaobao

很好,谢谢