如图所示，因为要做这个复杂箱梁的变截面，就想先映射划分，划分好网格再合并各个area，但是不知道该怎么做。
不合并的话我用secread读取截面会出错，说我的截面存在16个不连接的区域，想问问各位大神该怎么解决，命令流如下：
/prep7
/title,YBX1 section and mesh
et,1,plane82
k,1,0,2.528
k,2,1.3,2.528
k,3,1.3,2.504
k,4,1.01,2.504
k,5,1.01,2.304
k,6,0.99,2.304
k,7,0.99,2.504
k,8,0.824,2.504
k,9,0.824,0.028
k,10,0.9,0.028
k,11,0.9,0
k,12,0,0
k,13,0,0.028
k,14,0.29,0.028
k,15,0.29,0.268
k,16,0.31,0.268
k,17,0.31,0.028
k,18,0.8,0.028
k,19,0.8,0.618
k,20,0.56,0.618
k,21,0.56,0.638
k,22,0.8,0.638
k,23,0.8,1.204
k,24,0.56,1.204
k,25,0.56,1.228
k,26,0.8,1.228
k,27,0.8,1.868
k,28,0.56,1.868
k,29,0.56,1.888
k,30,0.8,1.888
k,31,0.8,2.504
k,32,0.424,2.504
k,33,0.424,2.264
k,34,0.4,2.264
k,35,0.4,2.504
k,36,0,2.504
ksymm,x,2,11,1,35
ksymm,x,14,35,1,33
a,2,3,38,37
a,8,9,18,31
a,10,11,46,45
a,44,43,64,51
a,4,5,6,7
a,27,28,29,30
a,23,24,25,26
a,19,20,21,22
a,14,15,16,17
a,50,49,48,47
a,55,54,53,52
a,59,58,57,56
a,63,62,61,60
a,42,41,40,39
a,68,67,66,65
a,32,33,34,35

lsel,s,line,,2,4,2
lsel,a,line,,5,7,2
lsel,a,line,,10,12,2
lsel,a,line,,13,15,2
lesize,all,,,30

lsel,s,line,,1,3,2
lsel,a,line,,6,8,2
lsel,a,line,,9,11,2
lsel,a,line,,14,16,2
lesize,all,,,2


asel,all
mshkey,2
amesh,all




secwrite,YBX1,sect,,1
sectype,1,beam,mesh,
secoffset,user,0,2.528,
secread,'YBX1','sect',,mesh