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<BR>/prep7 <BR>!------------------------------------------- <BR>!定义截面类型(共6种钢管) <BR>*dim,DOUT,,6 !外径 <BR>*dim,DIN,,6 !内径 <BR>DOUT(1)=45 !管45X4 <BR>DIN(1)=37 <BR>DOUT(2)=63 !管63X4 <BR>DIN(2)=55 <BR>DOUT(3)=89 !管89X5 <BR>DIN(3)=79 <BR>DOUT(4)=113 !管113X6 <BR>DIN(4)=101 <BR>DOUT(5)=140 !管140X6 <BR>DIN(5)=128 <BR>DOUT(6)=159 !管159X8 <BR>DIN(6)=143 <BR>*dim,AREA,,6 !截面积 <BR>*dim,RI,,6 !回转半径 <BR>*do,i,1,6 <BR>AREA(i)=3.1415926*(DOUT(i)*DOUT(i)-DIN(i)*DIN(i))/4 <BR>RI(i)=0.25*sqrt((DOUT(i)*DOUT(i)+DIN(i)*DIN(i))) <BR>*enddo <BR>!------------------------------------------ <BR>!结构基本参数输入 <BR>DX=2000 !横向网格尺寸 <BR>DY=2000 !纵向网格尺寸 <BR>DZ=2000 !网架截面高度 <BR>NX=30 !横向网格数量 <BR>NY=28 !纵向网格数量 <BR>DLOAD=1.06e-3 !屋面均布荷载设计值 <BR>FD=215 !钢材强度设计值 <BR>FY=235 ! 植 屈服强度 <BR>RATIO1=0.85 !应力比上限 <BR>RATIO2=0.7 !应力比下限 <BR>EE=2.06e5 !弹性模量 <BR>NEALL=8*NX*NY !单元总数 <BR>!------------------------------------------ <BR>!定义实常数 <BR>*do,i,1,6 <BR>r,i,AREA(i) <BR>*enddo <BR>!------------------------------------------ <BR>!定义单元类型-杆单元 <BR>ET,1,LINK8 <BR>!----------------------------------------------------- <BR>!定义材料特性 <BR>MP, EX, 1, EE !钢材 <BR>MP, NUXY, 1, 0.3 <BR>MP, DENS, 1, 7.85e-6 <BR>!------------------------------------------ <BR>!节点定义 <BR>!上弦节点 <BR>*do,i,1,NY+1 <BR>*do,j,1,NX+1 <BR>k=(i-1)*(NX+1)+j <BR>n,k,(j-1)*DX,(i-1)*DY <BR>*enddo <BR>*enddo <BR>NNUP=k !记录上弦节点总数 <BR>!下弦节点 <BR>*do,i,1,NY <BR>*do,j,1,NX <BR>k=(i-1)*NX+j+NNUP <BR>n,k,(j-1)*DX+DX/2,(i-1)*DY+DY/2,-DZ <BR>*enddo <BR>*enddo <BR>NNALL=k !记录节点总数 <BR>NNBOT=NNALL-NNUP !记录下弦节点总数 <BR>!------------------------------------------ <BR>!单元定义,最初定义为1号截面 <BR>!横向上弦杆件 <BR>NEUP1=0 !记录横向上弦杆件总数 <BR>*do,i,1,NY+1 <BR>*do,j,1,NX <BR>k=(i-1)*(NX+1)+j <BR>e,k,k+1 <BR>NEUP1=NEUP1+1 <BR>*enddo <BR>*enddo <BR>!纵向上弦杆件 <BR>NEUP2=0 !记录纵向上弦杆件总数 <BR>*do,i,1,NY <BR>*do,j,1,NX+1 <BR>k=(i-1)*(NX+1)+j <BR>e,k,k+NX+1 <BR>NEUP2=NEUP2+1 <BR>*enddo <BR>*enddo <BR>!横向下弦杆件 <BR>NEBOT1=0 !记录横向下弦杆件总数 <BR>*do,i,1,NY <BR>*do,j,1,NX-1 <BR>k=(i-1)*NX+j+NNUP <BR>e,k,k+1 <BR>NEBOT1=NEBOT1+1 <BR>*enddo <BR>*enddo <BR>!纵向下弦杆件 <BR>NEBOT2=0 !记录纵向下弦杆件总数 <BR>*do,i,1,NY-1 <BR>*do,j,1,NX <BR>k=(i-1)*NX+j+NNUP <BR>e,k,k+NX <BR>NEBOT2=NEBOT2+1 <BR>*enddo <BR>*enddo <BR>!斜腹杆 <BR>NEMID=0 !记录纵向下弦杆件总数 <BR>*do,i,1,NY <BR>*do,j,1,NX <BR>k1=(i-1)*NX+j+NNUP <BR>k2=k1-NNUP+(i-1) <BR>e,k1,k2 <BR>e,k1,k2+1 <BR>e,k1,k2+NX+1 <BR>e,k1,k2+NX+2 <BR>NEMID=NEMID+4 <BR>*enddo <BR>*enddo <BR>!------------------------------------------ <BR>!施加节点约束 <BR>!这一步宜在GUI界面中进行,然后将边界条件写入文件load1.txt <BR>/input,load1,txt <BR>!------------------------------------------ <BR>!施加节点约束 <BR>!这一步宜在GUI界面中进行,然后将边界条件写入文件boundary.txt <BR>/input,boundary,txt <BR>!------------------------------------------ <BR>!求解 <BR>/solu <BR>solve <BR>!------------------------------------------ <BR>!下面开始优化截面 <BR>!首先定义数组,得到一些常量 <BR>*dim,FORCE,,NEALL !定义杆件内力数组 <BR>*dim,LENGTH,,NEALL !定义杆件长度数组 <BR>*do,i,1,NEALL !得出杆件长度 <BR>*get,LENGTH(i),elem,i,leng <BR>*enddo <BR>!------------------------------------------ <BR>*dim,NSECTION,,NEALL !定义杆件截面号数组 <BR>*do,i,1,NEALL !初始值为1 <BR>NSECTION(i)=1 <BR>*enddo <BR>! <BR>!****************************************************** <BR>!开始循环调整杆件截面 <BR>*do,NNN,1,15 !共调整15次 <BR>!------------------------------------------ <BR>!得出杆件内力(拉正压负) <BR>/post1 <BR>*do,i,1,NEALL <BR>*get,force(i),elem,i,smisc,1 <BR>*enddo <BR>!------------------------------------------ <BR>!截面校核,得出应力比 <BR>*do,i,1,NEALL <BR>k=NSECTION(i) <BR>temp=3.1415926/sqrt(FY/EE) <BR>*if,FORCE(i),ge,0,then !拉杆 <BR> RATIO=FORCE(i)/AREA(k)/FD !拉杆应力比 <BR>*elseif,FORCE(i),lt,0,then !压杆,a类截面 <BR> SLENDER=LENGTH(i)/RI(k) !长细比 <BR> d1=SLENDER/temp !相对长细比 <BR> *if,d1,le,0.215,then !稳定系数 <BR> FI=1-0.41*d1*d1 <BR> *else <BR> d2=0.986+0.152*d1+d1*d1 <BR> FI=(d2-sqrt(d2*d2-4*d1*d1))/2/d1/d1 <BR> *endif <BR> RATIO=-FORCE(i)/AREA(k)/FD/FI !压杆应力比 <BR>*endif <BR>!------------------------------------------ <BR>!截面调整 <BR>*if,RATIO,LT,RATIO2,then <BR> NSECTION(i)=NSECTION(i)-1 <BR>*elseif,RATIO,GT,RATIO1,then <BR> NSECTION(i)=NSECTION(i)+1 <BR>*endif <BR>*if,NSECTION(i),lt,1,then !已经选到最小截面 <BR> NSECTION(i)=1 <BR>*endif <BR>*if,NSECTION(i),gt,6,then !已经选到最大截面 <BR> NSECTION(i)=6 <BR>*endif <BR>*enddo <BR>!------------------------------------------ <BR>!重新定义单元 <BR>finish <BR>/prep7 <BR>edele,all !删除所有单元 <BR>NUMCMP,ELEM !压缩单元号 <BR>kkk=0 <BR>!横向上弦杆件 <BR>*do,i,1,NY+1 <BR>*do,j,1,NX <BR>k=(i-1)*(NX+1)+j <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k,k+1 <BR>*enddo <BR>*enddo <BR>!纵向上弦杆件 <BR>*do,i,1,NY <BR>*do,j,1,NX+1 <BR>k=(i-1)*(NX+1)+j <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k,k+NX+1 <BR>*enddo <BR>*enddo <BR>!横向下弦杆件 <BR>*do,i,1,NY <BR>*do,j,1,NX-1 <BR>k=(i-1)*NX+j+NNUP <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k,k+1 <BR>*enddo <BR>*enddo <BR>!纵向下弦杆件 <BR>*do,i,1,NY-1 <BR>*do,j,1,NX <BR>k=(i-1)*NX+j+NNUP <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k,k+NX <BR>*enddo <BR>*enddo <BR>!斜腹杆 <BR>*do,i,1,NY <BR>*do,j,1,NX <BR>k1=(i-1)*NX+j+NNUP <BR>k2=k1-NNUP+(i-1) <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k1,k2 <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k1,k2+1 <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k1,k2+NX+1 <BR>kkk=kkk+1 <BR>kkk1=NSECTION(kkk) <BR>REAL,kkk1 <BR>e,k1,k2+NX+2 <BR>*enddo <BR>*enddo <BR>!------------------------------------------ <BR>!求解 <BR>finish <BR>/solu <BR>solve <BR>*enddo <BR>!************************************************ <BR>!------------------------------------------ <BR>/post1 <BR>PLESOL,SMISC,1,0,1 !画出轴力图 <BR>!------------------------------------------ <BR>!得出杆件内力(拉正压负) <BR>*do,i,1,NEALL <BR>*get,force(i),elem,i,smisc,1 <BR>*enddo <BR>!------------------------------------------ <BR>!最后截面校核,得出应力比,并打印应力比 <BR>/OUT,STRESSRATIO,txt <BR>TOTALMASS=0 !总质量 <BR>*do,i,1,NEALL <BR>k=NSECTION(i) <BR>temp=3.1415926/sqrt(FY/EE) <BR>*if,FORCE(i),ge,0,then !拉杆 <BR> RATIO=FORCE(i)/AREA(k)/FD !拉杆应力比 <BR>*elseif,FORCE(i),lt,0,then !压杆,a类截面 <BR> SLENDER=LENGTH(i)/RI(k) !长细比 <BR> d1=SLENDER/temp !相对长细比 <BR> *if,d1,le,0.215,then !稳定系数 <BR> FI=1-0.41*d1*d1 <BR> *else <BR> d2=0.986+0.152*d1+d1*d1 <BR> FI=(d2-sqrt(d2*d2-4*d1*d1))/2/d1/d1 <BR> *endif <BR> RATIO=FORCE(i)/AREA(k)/FD/FI !压杆应力比 <BR>*endif <BR>TOTALMASS=TOTALMASS+AREA(k)*LENGTH(i)*7.85e-6 <BR>*VWRITE,i,k,DOUT(k),(DOUT(k)-DIN(k))/2,RATIO, <BR>(1X,F8.1,F8.1,' ',F5.1,'X',F5.1,' ',F10.4) <BR>*enddo <BR>*enddo <BR>*VWRITE,TOTALMASS <BR>(1X,' ,'F20.4) <BR>*LIST,STRESSRATIO,txt <BR> <BR>下面是boundary.txt文件 <BR>这个文件用来社定边界条件,这个可根据情况而变化 <BR>D, 1 , UZ <BR>D, 4 , UZ <BR>D, 7 , UZ <BR>D, 10 , UZ <BR>D, 13 , UZ <BR>D, 16 , UZ <BR>D, 19 , UZ <BR>D, 22 , UZ <BR>D, 25 , UZ <BR>D, 28 , UZ <BR>D, 31 , UZ <BR>D, 125 , UZ <BR>D, 140 , UZ <BR>D, 155 , UZ <BR>D, 249 , UZ <BR>D, 264 , UZ <BR>D, 279 , UZ <BR>D, 373 , UZ <BR>D, 388 , UZ <BR>D, 403 , UZ <BR>D, 497 , UZ <BR>D, 512 , UZ <BR>D, 527 , UZ <BR>D, 621 , UZ <BR>D, 636 , UZ <BR>D, 651 , UZ <BR>D, 745 , UZ <BR>D, 760 , UZ <BR>D, 775 , UZ <BR>D, 869 , UZ <BR>D, 872 , UZ <BR>D, 875 , UZ <BR>D, 878 , UZ <BR>D, 881 , UZ <BR>D, 884 , UZ <BR>D, 887 , UZ <BR>D, 890 , UZ <BR>D, 893 , UZ <BR>D, 896 , UZ <BR>D, 899 , UZ <BR>D, 1 , UX <BR>D, 1 , UY <BR>D, 899 , UX <BR>D, 899 , UY <BR>D, 31 , UX <BR>D, 31 , UY <BR>D, 869 , UX <BR>D, 869 , UY <BR>【 在 gxn (老农) 的大作中提到: 】 <BR>: /prep7 <BR>: !------------------------------------------- <BR>: !定义截面类型(共6种钢管) <BR>: *dim,DOUT,,6 !外径 <BR>: *dim,DIN,,6 !内径 <BR>: DOUT(1)=45 !管45X4 <BR>: DIN(1)=37 <BR>: DOUT(2)=63 !管63X4 <BR>: DIN(2)=55 <BR>: DOUT(3)=89 !管89X5 <BR>: .................(以下省略) <BR>在下面是load1.txt文件,这个文件用来施加何在,如果只有屋面均布何在,前面几行就 <BR>可以了,我这个网架还有下弦吊载,所以比较长 <BR>!------------------------------------------------------ <BR>!施加上弦节点荷载 <BR>*do,i,1,NNUP <BR>f,i,fz,-DLOAD*DX*DY <BR>*enddo <BR>!------------------------------------------------------ <BR>!输入自重 <BR>ACEL,0,0,11.9952, !9.8*1.02*1.2设计值 <BR>!------------------------------------------------------ <BR>!风管下弦吊载 <BR>F, 931 , FZ, -3600 <BR>F, 939 , FZ, -3600 <BR>F, 950 , FZ, -3600 <BR>F, 958 , FZ, -3600 <BR>F, 961 , FZ, -3600 <BR>F, 969 , FZ, -3600 <BR>F, 980 , FZ, -3600 <BR>F, 988 , FZ, -3600 <BR>F, 991 , FZ, -3600 <BR>F, 999 , FZ, -3600 <BR>F, 1010 , FZ, -3600 <BR>F, 1018 , FZ, -3600 <BR>F, 1021 , FZ, -3600 <BR>F, 1029 , FZ, -3600 <BR>F, 1040 , FZ, -3600 <BR>F, 1048 , FZ, -3600 <BR>F, 1051 , FZ, -3600 <BR>F, 1059 , FZ, -3600 <BR>F, 1070 , FZ, -3600 <BR>F, 1078 , FZ, -3600 <BR>F, 1081 , FZ, -3600 <BR>F, 1089 , FZ, -3600 <BR>F, 1100 , FZ, -3600 <BR>F, 1108 , FZ, -3600 <BR>F, 1111 , FZ, -3600 <BR>F, 1119 , FZ, -3600 <BR>F, 1130 , FZ, -3600 <BR>F, 1138 , FZ, -3600 <BR>F, 1141 , FZ, -3600 <BR>F, 1149 , FZ, -3600 <BR>F, 1160 , FZ, -3600 <BR>F, 1168 , FZ, -3600 <BR>F, 1171 , FZ, -3600 <BR>F, 1179 , FZ, -3600 <BR>F, 1190 , FZ, -3600 <BR>F, 1198 , FZ, -3600 <BR>F, 1201 , FZ, -3600 <BR>F, 1209 , FZ, -3600 <BR>F, 1220 , FZ, -3600 <BR>F, 1228 , FZ, -3600 <BR>F, 1231 , FZ, -3600 <BR>F, 1239 , FZ, -3600 <BR>F, 1250 , FZ, -3600 <BR>F, 1258 , FZ, -3600 <BR>F, 1261 , FZ, -3600 <BR>F, 1269 , FZ, -3600 <BR>F, 1280 , FZ, -3600 <BR>F, 1288 , FZ, -3600 <BR>F, 1291 , FZ, -3600 <BR>F, 1299 , FZ, -3600 <BR>F, 1310 , FZ, -3600 <BR>F, 1318 , FZ, -3600 <BR>F, 1321 , FZ, -3600 <BR>F, 1329 , FZ, -3600 <BR>F, 1340 , FZ, -3600 <BR>F, 1348 , FZ, -3600 <BR>F, 1351 , FZ, -3600 <BR>F, 1359 , FZ, -3600 <BR>F, 1370 , FZ, -3600 <BR>F, 1378 , FZ, -3600 <BR>F, 1381 , FZ, -3600 <BR>F, 1389 , FZ, -3600 <BR>F, 1400 , FZ, -3600 <BR>F, 1408 , FZ, -3600 <BR>!------------------------------------------------------ <BR>!电动葫芦吊车下弦荷载 <BR>F, 927, FZ, -48000 <BR>F, 1047, FZ, -48000 <BR>F, 1167, FZ, -48000 <BR>F, 1317, FZ, -48000 <BR>F, 1437, FZ, -48000 <BR>!------------------------------------------------------ <BR>!桥式吊车下弦荷载 <BR>F, 902, -21840 !最小轮压(靠边) <BR>F, 1022, -21840 <BR>F, 1142, -21840 <BR>F, 1262, -21840 <BR>F, 1382, -21840 <BR>F, 910, -89600 !最大轮压(居中) <BR>F, 1030, -89600 <BR>F, 1150, -89600 <BR>F, 1270, -89600 <BR>F, 1390, -89600 |
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