周期对称结构的静力分析实例.doc

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1、/filname,ch08/title,static analysis of compressor structuren with hole/prep7et,1,solid45mp,ex,1,1.15e5mp,prxy,1,0.30782mp,dens,1,4.48e-9k,1,226,208.8k,2,226,258.7k,3,157,258.7k,4,237.5,220.3k,5,229.2,220.3k,6,237.5,208.8k,7,126,276.7k,8,138,276.7k,9,102.5,263k,10,102.5,248.7k,11,237.5,273.8k,12,237.

2、5,264.1k,13,135,248.7k,14,243.85,273.8k,15,243.85,254.8k,16,229.2,254.8k,17,162.5,264.1/pnum,kp,1/pnum,line,1/number,2/view,1,-1/auto,1lstr,1,2lstr,2,3lstr,1,6lstr,6,4lstr,4,5lstr,5,16lstr,16,15lstr,15,14lstr,14,11lstr,11,12lstr,12,17lstr,8,7lstr,7,9lstr,9,10lstr,10,13lplotltan,11,8 !创建切线ltan,2,13al

3、,all/pnum,line,0/pnum,kp,0k,18,k,19,300vrotat,all,18,19,60/view,1,1,1,1/auto,1savewprot,30cyl4,200,0,10,300!注意圆柱的深度方向是沿工作平面坐标系!z向的；vsbv,1,2save/view,1,-1/auto,1wpcsys,-1,0lstr,18,19flst,2,2,8fitem,2,0,0,0fitem,2,220,0,0circle,p51x,60flst,2,2,8fitem,2,0,0,0fitem,2,180,0,0circle,p51x,60lsla,u !将与面关联的线

4、从选择集中去除/pnum,line,1adrag,53,52adrag,54,52/pnum,line,0allselaslv,uvsba,all,allallselwprot,90wprot,21vsbw,allwprot,9vsbw,allwprot,9vsbw,allldele,52,1!删除轴线csys,1!激活坐标系转为总体柱坐标系vsel,s,loc,x,180,220cm,holevol,voluallselvplotsave!定义周期对称分析选项!定义高低角度组件!即周期对称结构的对称边界!组件命名时，前面的cyclic即为组件根名asel,s,loc,y,0cm,cyclic

5、_m01l,areaasel,s,loc,y, 60cm,cyclic_m01h,areaallselcyclic,6,60,1,cyclic!此步为指定周期对称分析选项!连接线和面以便于映射网格划分esize,3cmsel,s,holevolvsel,r,loc,y,21,30aslv,swpcsys,-1,0wprot,30wpoff,200cswpla,11,1asel,u,loc,z,264.1asel,u,loc,z,258.7asel,u,loc,x,10csys,1asel,u,loc,y,30accat,alllsla,slsel,r,loc,z,264.1lccat,alll

6、sla,slsel,r,loc,z,258.7lccat,all!生成网格，采用扫略网格划分type,1mshape,0,3dvsel,s,loc,y,0,21vsweep,allvsel,s,loc,y,21,30vsel,u,loc,x,180,220vsweep,allcmsel,s,holevolvsel,r,loc,y,21,30vsweep,allvsel,s,loc,y,0,30asel,s,accaadele,alllsel,s,lccaldele,allcsys,4vsymm,y,all,0,0allselnummrg,allnumcmp,allcsys,1nrotat,al

7、lsave/soluantype,staticnsel,s,loc,x,237.5nsel,r,loc,z,220.3,208.8d,all,ux,uyallselnsel,s,loc,z,208.8d,all,uy,uzallseleplotsaveomega,1191.11nsel,s,loc,x,243.5*get,no_nodes,node,countf,all,fx,628232/no_nodesallselsavesolvefinish/post1plnsol,u,x,2,1plnsol,u,y,2,1plnsol,u,z,2,1plnsol,u,sum,2,1plnsol,s,x

8、,0,1plnsol,s,y,0,1plnsol,s,z,0,1plnsol,s,eqv,0,1finish1 本例的特色之一在于分网，采用了体扫略网格划分，为了对均压孔周围的网格进行控制，首先对体进行了divide，划分为很多块；注意圆孔被一分为二；2 体扫略网格划分，要求体的面数为六面，同时每个面应为四条边，如果有多余的面和边，就要线将面进行concatenant连接，然后再将面进行连接；下图显示了圆孔所在的那部分分割体上的面和线是如何concatenant的：3本例的另一特色是周期对称分析的设置，体现在命令cyclic,6,60,1,cyclic；菜单命令为：preprocessor/m

9、odeling/cyclic sector/user defined；周期对称边界首先要定义高低角度组件，即周期对称结构的对称边界，ANSYS要求模型的高低角度组件上的网格要对应。高低角度组件可以有ANSYS自动检测，也可以自己定义，本例采用了自定义的方式，命令流如下：定义组件命名时，前面的cyclic即为组件根名（root name of components）,本例中，扇区数为6，扇区角度为60度，周期对称坐标系为1，即表示总体柱坐标系；asel,s,loc,y,0cm,cyclic_m01l,areaasel,s,loc,y, 60cm,cyclic_m01h,areacyclic,6,60,1,cyclic