1、施威德勒型球面網殼的建模過程詳解1、問題描述：一球面半徑20.0m，跨度35m，矢跨比1:3.5的單層球面網殼。網橋結構所有桿件均采用114.0×4.0的235鋼管。建模過程中所有數據單位統一為N-mm制。模型側視圖模型俯視圖模型軸測圖2、 此問題擬采用ANSYS建模和受力分析。3、 施威德勒型球面網殼建模及分析命令流。! 結構建模finish /clear /filename,schwedler /title,analysis of spherical reticulated-shell /prep7et,1,beam4 r,1,1382,2093500,2093500,114,1

2、14, rmore,4187000, mp,dens,1,7.85e-9 mp,ex,1,2.06e5 mp,nuxy,1,0.3 local,11,2,0,0,0cscir,11,1 n,1,20000,0,30 n,10,20000,180,30 n,18,20000,340,30 fill,1,10 fill,10,18 ngen,6,18,1,18,1,0,0,10 n,109,20000,0,90 *do,i,1,91,18 e,i,i+1 egen,17,1,i,i,1 e,i+17,i*enddoe,1,19 egen,5,18,109,109,1 egen,18,1,109,1

3、13,1 *do,i,91,108,1 e,i,109 *enddo *do,i,1,73,18 e,i,i+19*enddo egen,17,1,217,221,1 *do,i,18,90,18 e,i,i+1 *enddocsys,0nsel,s,loc,z,9900,10100d,all,ux,uy,uz,! 網殼結構的固有振動特性分析/solantype,modalmodopt,lanb,6modopt,lanb,6,0,0,offsolvefinish/post1set,listset,firstpldisp,0anmode,10,0.5,0set,nextpldisp,0anmod

4、e,10,0.5,0set,nextpldisp,0anmode,10,0.5,0set,nextpldisp,0anmode,10,0.5,0set,nextpldisp,0anmode,10,0.5,0set,nextpldisp,0anmode,10,0.5,0finish！特征值屈曲分析nsel,allf,all,fz,-1.00/soluantype,0eqslv,sparpstres,onsolvefinish/soluantype,1bucopt,lanb,6,0,0maxpand,6,0,0,1,0.001,solvefinish/post1set,firstpldisp,2s

5、et,nextpldisp,2set,nextpldisp,2set,nextpldisp,2set,nextpldisp,2set,nextpldisp,2finish! 考慮初始缺陷的非線性屈曲分析/prep7tb,biso,1,1,2,tbtemp,0tbdata,2.0e8,0,upgeom,35,1,1,schwedler,rst,finish/solantype,0nlgeom,1outres,all,allarclen,1,0,0,arctrm,u,100,109,uznsubst,200,1solvefinish/post26nsol,2,109,u,z,deflectionrforce,3,1,f,z,reactionf/axlab,x,deflection/axlab,y,reactionfxvar,2plvar,3Finish4、 可視化后處理及分析結果顯示。I:網殼結構的固有振動特性分析網殼的前六階固有頻率網殼結構的第一階振動模態網殼結構的第二階振動模態網殼結構的第三階振動模態網殼結構的第四階振動模態網殼結構的第五階振動模態網殼的第六階振動模態II：特征值屈曲分析注：屈曲分析分為三個步驟：首先是設置預應力選項并執行一次靜力分析