施威德勒型球面网壳的建模过程详解

1、施威德勒型球面网壳的建模过程详解1、问题描述：一球面半径20.0m，跨度35m，矢跨比1:3.5的单层球面网壳。网桥结构所有杆件均采用114.0×4.0的235钢管。建模过程中所有数据单位统一为N-mm制。模型侧视图模型俯视图模型轴测图2、 此问题拟采用ANSYS建模和受力分析。3、 施威德勒型球面网壳建模及分析命令流。! 结构建模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,! 网壳结构的固有振动特性分析/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! 考虑初始缺陷的非线性屈曲分析/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、 可视化后处理及分析结果显示。I:网壳结构的固有振动特性分析网壳的前六阶固有频率网壳结构的第一阶振动模态网壳结构的第二阶振动模态网壳结构的第三阶振动模态网壳结构的第四阶振动模态网壳结构的第五阶振动模态网壳的第六阶振动模态II：特征值屈曲分析注：屈曲分析分为三个步骤：首先是设置预应力选项并执行一次静力分析