利用ANSYS生成變截面箱梁

1、利用ANSYS生成變截面箱梁Beam188/189支持自定義的變截面1、首先建立變截面箱梁截面，并保存截面。必須保證每個(gè)截面的關(guān)鍵點(diǎn)號(hào)相同， 而且為保證生成的準(zhǔn)確性，應(yīng)盡量的使得關(guān)鍵點(diǎn)有足夠多的數(shù)目。2、要對(duì)截面進(jìn)行面積分塊，并指定各線段的段數(shù)，這樣才能做出規(guī)整的箱梁截 面網(wǎng)格劃分，也就保證了變截面箱梁橋各截面的網(wǎng)格模式相同，建議對(duì)于變化急 劇的兩邊截面應(yīng)使得線足夠的短。 并不是劃分越密越可能成功，而是線越短越可 能成功3、通過(guò)梁節(jié)段兩端對(duì)應(yīng)的截面建立taper截面，定義好橋的線形后，指定每段 線對(duì)應(yīng)的taper截面。4、可以用slist命令查看生成截面的性質(zhì)，加深對(duì) secread命令的理解

2、 以下例進(jìn)行說(shuō)明：I - I截面圖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