利用ANSYS生成變截面箱梁

1、利用ANSY$&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。必須保證每個截面的關(guān)鍵點號相同， 而且為保證生成的準確性，應盡量的使得關(guān)鍵點有足夠多的數(shù)目。2、要對截面進行面積分塊，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，建議對丁變化急 劇的兩邊截面應使得線足夠的短。 并不是劃分越密越可能成功，而是線越短越可 能成功3、通過梁節(jié)段兩端對應的截面建立taper截面，定義好橋的線形后，指定每段 線對應的taper截面。4、可以用slist命令查看生成截面的性質(zhì)，加深對 secread命

2、令的理解 以下例進行說明：-I截面圖全梁1/2圖示I - I截面命令流finish/clear/prep7k,1k,2,2750k,3,3350,2400k,4,5450,2750k,5,6700,2850k,6,6700,3050k,7,0,3050k,8,0,280k,9,2359,280k,10,2886,2400k,11,1836,2750k,12,0,2750l, 1,2l,2,3l,3,4l,4,5l,5,6l,6,7l,8,9l,9,101,10,111,11,121,1,81,7,12 a1,a11 arsym,x,a11 aadd,1,2 nummrg,a11 numcmp,

3、a11 ade1e,11,2,91,13,20 1,14,19 1,10,3 1,1,8 a1,22,17,25,19 a1,25,1,21,7 1comb,15,20 wpoffs,-5450,2750 wprota,90 1sbw,18 wpcsys,-1wpoffs,-3350,2400 wprota,90 1sbw,20 wpcsys,-1 wpoffs,-2886,2400 wprota,90 1sbw,18 wpcsys,-1 1,15,181,14,211,19,221,7,12 a1,14,13,18,26 a1,18,12,29,27 a1,29,23,30,28 a1,30

4、,15,31,20 1comb,9,10 wpoffs,5450,2750 wprota,90 1sbw,6 wpcsys,-1 wpoffs,3350,2400 wprota,90 lsbw,32 wpcsys,-1 wpoffs,2886,2400 wprota,90 lsbw,6 wpcsys,-1l,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

5、,35,32 l,34,31 al,23,42,49,39 al,49,41,50,38 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

6、,42,1 lesize,39,1 lesize,49,1 lesize,41,1 lesize,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

7、,2d mshkey,1 amesh,11 amesh,12 amesh,13 amesh,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,2 amesh,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 m

8、shkey,2 amesh,5 lesize,30,1 lesize,20,4 lesize,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,

9、1,2d mshkey,2 amesh,8 lesize,6,1 lesize,5,1 lesize,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,5004,12300k,5005,0l, 5000,5001l,5001,5002l,5002,5003l,5003,5004l,5000,5005 k,100,8300,4000 k,101,9500,4000 k,102

10、,10000,4000 et,1,beam189 mp,ex,1,3.0e10 mp,prxy,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,meshsecread,mybox3,

11、mesh sectype,6,taper secdata,4,8851 secdata,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,5,8allsellsel,s,line,1 latt,1,1,100