利用ANSYS生成变截面箱梁

1、利用ANSYS生成变截面箱梁Beam188/189支持自定义的变截面1、首先建立变截面箱梁截面，并保存截面。必须保证每个截面的关键点号相同， 而且为保证生成的准确性，应尽量的使得关键点有足够多的数目。2、要对截面进行面积分块，并指定各线段的段数，这样才能做出规整的箱梁截 面网格划分，也就保证了变截面箱梁桥各截面的网格模式相同，建议对于变化急 剧的两边截面应使得线足够的短。 并不是划分越密越可能成功，而是线越短越可 能成功3、通过梁节段两端对应的截面建立taper截面，定义好桥的线形后，指定每段 线对应的taper截面。4、可以用slist命令查看生成截面的性质，加深对 secread命令的理解

2、 以下例进行说明：I - I截面图a=2函引 i - i 理H4 finish o-ear 、pep7 k22750 k333502400 k454502750 k567002850 k66700oo050 k-703050 kooo280 ko235928o 028862400 km 8392750 = 202750 _12 _23 _34 _45 _56 s _89L9L0l,10,11l,11,12l,1,8l,7,12 al,all arsym,x,all aadd,1,2 nummrg,all numcmp,all adele,1l,2,9l,13,20l,14,19 l,10,3l

3、,1,8 al,22,17,25,19 al,25,1,21,7 lcomb,15,20 wpoffs,-5450,2750 wprota,90 lsbw,18 wpcsys,-1 wpoffs,-3350,2400 wprota,90 lsbw,20 wpcsys,-1 wpoffs,-2886,2400 wprota,90 lsbw,18 wpcsys,-1 l,15,18l,14,21l,19,22 al,14,13,18,26 al,18,12,29,27 al,29,23,30,28 al,30,15,31,20 lcomb,9,10 wpoffs,5450,2750 wprota,

4、90 lsbw,6 wpcsys,-1 wpoffs,3350,2400 wprota,90 lsbw,32 wpcsys,-1 wpoffs,2886,2400 wprota,90 lsbw,6 wpcsys,-1 l,4,11 l,3,23 l,10,24 al,5,4,6,10 al,3,6,33,35 al,24,35,34,36 al,9,36,32,31 ldiv,16,4 ldiv,11,4 ldiv,2,4 ldiv,8,4 l,30,27 l,29,26 l,28,25 l,36,33 l,35,32 l,34,31 al,23,42,49,39 al,49,41,50,38

5、 al,50,40,51,37 al,51,11,22,16 al,24,48,52,45 al,52,47,53,44 al,53,46,54,43 al,54,8,21,2 nummrg,all numcmp,all et,1,82 lesize,1,4 lesize,17,4 lesize,19,4 lesize,7,4 lesize,22,1 lesize,21,1 lesize,25,1 mshape,1,2d mshkey,2 amesh,1 amesh,2 lesize,23,1 lesize,42,1 lesize,39,1 lesize,49,1 lesize,41,1 le

6、size,50,1 lesize,38,1 lesize,40,1 lesize,37,1 lesize,51,1 lesize,11,1 lesize,16,1 lesize,22,1 lesize,24,1 lesize,45,1 lesize,48,1 lesize,52,1 lesize,44,1 lesize,47,1 lesize,53,1 lesize,43,1 lesize,46,1 lesize,54,1 lesize,2,1 lesize,8,1 lesize,21,1 mshape,0,2d mshkey,1 amesh,11 amesh,12 amesh,13 ames

7、h,14 amesh,15 amesh,16 amesh,17 amesh,18 lesize,13,2 lesize,26,2 lesize,14,1 lesize,18,1 mshape,1,2d mshkey,2amesh,3 lesize,12,3 lesize,27,3 lesize,18,1 lesize,29,1 mshape,1,2d mshkey,2 amesh,4 lesize,23,1 lesize,29,1 lesize,30,1 lesize,28,1 mshape,0,2d mshkey,2 amesh,5 lesize,30,1 lesize,20,4 lesiz

8、e,31,1 lesize,15,4 mshape,1,2d mshkey,2 amesh,6 lesize,31,1 lesize,9,4 lesize,36,1 lesize,32,4 mshape,1,2d mshkey,2 amesh,10 lesize,35,1 lesize,34,1 lesize,24,1 lesize,36,1 mshape,0,2d mshkey,2 amesh,9 lesize,6,1 lesize,35,1 lesize,3,3 lesize,33,3 mshape,1,2d mshkey,2 amesh,8 lesize,6,1 lesize,5,1 l

9、esize,10,2 lesize,4,2 mshape,1,2d mshkey,2 amesh,7 secwrite,mybox1 主命令流 finish/clear /prep7 k,5000,7800 k,5001,8851 k,5002,9899 k,5003,10800 k,5004,12300 k,5005,0l,5000,5001l,5001,5002l,5002,5003l,5003,5004l,5000,5005 k,100,8300,4000 k,101,9500,4000 k,102,10000,4000 et,1,beam189 mp,ex,1,3.0e10 mp,pr

10、xy,1,0.167 sectype,1,beam,mesh secread,mybox1,mesh sectype,2,beam,mesh secread,mybox2,mesh sectype,3,taper secdata,1,7800 secdata,2,8851 et,2,beam189 mp,ex,2,3.0e10 mp,prxy,2,0.167 sectype,4,beam,mesh secread,mybox2,mesh sectype,5,beam,mesh secread,mybox3,mesh sectype,6,taper secdata,4,8851 secdata,

11、5,9899 et,3,beam189 mp,ex,3,3.0e10 mp,prxy,3,0.167 sectype,7,beam,mesh secread,mybox3,mesh sectype,8,beam,mesh secread,mybox4,mesh sectype,9,taper secdata,7,9899 secdata,8,10800 et,4,beam189 mp,ex,4,3.0e10 mp,prxy,4,0.167 sectype,10,beam,mesh secread,mybox4,mesh et,5,beam189 mp,ex,5,3.0e10 mp,prxy,5,0.167 sectype,11,beam,mesh secread,mybox1,mesh lesize,1,2 lesize,2,2 lesize,3,2 lesize,4,2 lesize,5,8 allsel lsel,s,line,1 latt,1,1,100,3 all