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COMBIN39的问题

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发表于 2005-11-8 10:30 | 显示全部楼层 |阅读模式

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Nodes I and J of element 323 ( COMBIN39 ) are not coincident.           <BR>怎样解释,COMBIN39的弹性是用20对数值确定的,和这个有关系吗?COMBIN39但愿对两节点有什么要求?
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发表于 2005-11-8 10:58 | 显示全部楼层
警告提醒你节点I,J的节点坐标系必须一致
发表于 2005-11-8 11:35 | 显示全部楼层
<P>一个combin39单元应用实例</P>
<P>橡胶垫选用combin39; <BR>若考虑叠层橡胶垫隔震,则可考虑combin14,该算例全部体现; <BR><BR>/prep7 <BR>local,11,1 <BR>cscir,11,1 <BR>f=8.892 <BR>h=2 <BR>w=39 <BR>r=(f*f+(w*w/4))/(2*f) <BR>b=(atan(2*(r-f)/w))*180/3.14159 <BR>n,1,r,b <BR>n,14,r,180-b <BR>fill,1,14 <BR>/view,1,1,1,1 <BR>/ang,1 <BR>/rep,fast <BR>local,11, <BR>ngen,22,14,1,14,1,,,3 <BR>local,11,1 <BR>n,309,r-h,(90+12*b)/13,1.5 <BR>ngen,13,1,309,309,,,(180-2*b)/13 <BR>local,11 <BR>ngen,21,13,309,321,1,,,3 <BR>et,1,link8 <BR>mp,ex,1,2.06e11 <BR>mp,dens,1,7890 <BR>mp,nuxy,1,0.3 <BR>MP,DAMP,1,0.02 <BR>r,1,703e-6 <BR>type,1 <BR>mat,1 <BR>real,1 <BR>*do,i,1,14,1 <BR>e,i,i+14 <BR>*enddo <BR>egen,21,14,1,14,1 <BR>*do,i,1,13,1 <BR>e,i,i+1 <BR>*enddo <BR>egen,22,14,295,307,1 <BR>r,2,543e-6 <BR>type,1 <BR>mat,1 <BR>real,2 <BR>*do,i,309,321,1 <BR>e,i,i+13 <BR>*enddo <BR>egen,20,13,581,593,1 <BR>*do,i,309,320,1 <BR>e,i,i+1 <BR>*enddo <BR>egen,21,13,841,852,1 <BR>r,3,433e-6 <BR>type,1 <BR>mat,1 <BR>real,3 <BR>nx=13 <BR>ny=21 <BR>nnup=308 <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>*enddo <BR>*enddo <BR>allsel,all <BR>acel,,0 <BR>et,4,mass21 <BR>r,6,850,850,850 <BR>type,4 <BR>real,6 <BR>*do,i,1,308,1 <BR>e,i <BR>*enddo <BR>local,11,1 <BR>nsel,s,loc,x,r <BR>local,11 <BR>!f,all,fy,-1000 !动力分析,恒载不于考虑 <BR>local,11,1 <BR>nsel,s,loc,z,0 <BR>nsel,a,loc,z,63 <BR>nsel,a,loc,y,b <BR>nsel,a,loc,y,180-b <BR>local,11 <BR>!f,all,fy,-500 <BR>/REP <BR>local,11,1 <BR>nsel,s,loc,x,r-h <BR>local,11 <BR>!f,all,fy,-500 <BR>local,11,1 <BR>nsel,s,loc,z,1.5 <BR>nsel,a,loc,z,61.5 <BR>nsel,a,loc,y,(90+12*b)/13 <BR>nsel,a,loc,y,(2250-12*b)/13 <BR>local,11, <BR>!f,all,fy,-250 <BR>allsel,all <BR>GPLOT !进行总绘图 <BR>/PBC,ALL, ,1 !显示边界条件及值 <BR>/rep <BR>/solu <BR>nsel,s,node,,2,13,1 <BR>nsel,a,node,,296,307,1 <BR>d,all,uy,0 <BR>nsel,all <BR>nsel,s,node,,1,295,14 <BR>local,11,1 <BR>nsel,a,loc,y,180-b <BR>d,all,uy <BR>allsel <BR>fini <BR>/prep7 <BR>local,11,0 <BR>ngen,2,581,1,295,14, <BR>ngen,2,876,14,308,14, <BR>et,2,combin14,,,2 !叠层橡胶!(ke bu laolui) <BR>r,4,0.41e6 <BR>type,2 <BR>mat,1 <BR>real,4 <BR>*do,i,1,295,14 <BR>e,i,i+581 <BR>*enddo <BR>*do,i,14,308,14 <BR>e,i,i+876 <BR>*enddo !(ke bu laok) <BR>et,3,combin39,1,,, <BR>r,5,0,0,0.00002,0.009e4,0.0008,0.0225e4 !夹芯橡胶 <BR>type,3 <BR>mat,1 <BR>real,5 <BR>*do,i,1,295,14 <BR>e,i,i+581 <BR>*enddo <BR>*do,i,14,308,14 <BR>e,i,i+876 <BR>*enddo <BR>/solu <BR>d,1,uy,,,14,13,uz, <BR>d,295,uy,,,308,13,uz, <BR>nsel,s,node,,582,876,14 <BR>nsel,a,node,,890,1184,14 <BR>d,all,all,0 <BR>allsel,all <BR>fini <BR></P>
发表于 2005-11-8 11:36 | 显示全部楼层
COMBIN39单元中文翻译
 楼主| 发表于 2005-11-11 11:18 | 显示全部楼层
<P>谢谢各位!再问combination39可以用来做非线性弹性地基吗?</P>
发表于 2005-11-14 22:15 | 显示全部楼层

回复:(jl_zxw)谢谢各位!再问combination39可以用来...

<DIV class=quote><B>以下是引用<I>jl_zxw</I>在2005-11-11 11:18:18的发言:</B><BR>
<P>谢谢各位!再问combination39可以用来做非线性弹性地基吗?</P></DIV>
<br>可以的,通过定义d-f曲线
发表于 2005-11-15 14:50 | 显示全部楼层
我也有相同的疑问:我在框架结构中加入阻尼器(按弹簧COMBIN39处理),也总是提示Nodes I and J of element 84 ( COMBIN39 ) are not coincident,具体怎么处理?还有提示INPUT DISPLACEMENT MUST BE IN ASENDING ORDER FOR ELEMENT81.这个什么意思?怎么解决~~[em06]
发表于 2005-11-16 01:07 | 显示全部楼层

回复:(jl_zxw)COMBIN39的问题

<P>帮助文件里有说明的<BR><BR>Assumptions and Restrictions <BR>Nodes I and J may be anywhere in space (preferably coincident). <BR>No moment effects are included due to noncoincident nodes. That is, if the nodes are offset from the line of action, moment equilibrium may not be satisfied. </P>
发表于 2005-11-16 22:22 | 显示全部楼层
可以简单给做个程序么??<BR>在框架结构中加入阻尼器(按COMBIN39处理)~~
发表于 2006-4-4 13:30 | 显示全部楼层

谢谢3 楼的LINDA小姐

LINDA小姐,首先感谢你,你的贴子对我太重要了!!但有一点我不明白,就是COMBIN14单元的材料属性为什么是LINK8的材料属性?能不能另外给COMBIN14单元定义一个材料属性来定义COMBIN14单元的DAMP值?比如:MP,DAMP,2,0.02  请你不吝指教!!!<BR> QQ:275107429
发表于 2006-12-1 15:07 | 显示全部楼层
谢谢啊
发表于 2006-12-4 10:47 | 显示全部楼层
谢谢啊
发表于 2006-12-8 13:56 | 显示全部楼层
我也做这研究,也出现节点不重合的警告,但我就是用重合的节点加的弹簧单元,所以我觉得应该是单元的方向和设置的方向不同引起的问题,正在深入研究,看能不能解决,希望大家能进一步讨论下去!
发表于 2012-5-30 14:33 | 显示全部楼层
这是什么呢
发表于 2012-6-14 09:05 | 显示全部楼层
回复 13 # andyqiujie 的帖子

您好,请问ansys combin39单元警告两个节点不重合的原因,您解决了吗?如何解决的?还有keyopt3里,自由度方向说的是单元坐标系还是整体坐标系?期待您的答复,谢谢!
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