[转帖]ANSYS网架设计程序
<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 好贴，没注意到呀<BR><BR>支持楼主！
楼主辛苦了！顶
超级好
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