建立實體拱梁,如何定義坐標

莫等閑

2006年11月28日 15:58

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想用實體單元建立一個箱型拱
/prep7
!建立截面
k,1,-3.3,0
k,2,-3.2,0
k,3,-3.08,0
k,4,-2.98,0
k,5,-1.73,0
k,6,-1.63,0
k,7,-1.51,0
k,8,-1.41,0
k,9,-0.16,0
k,10,-0.06,0
k,11,0,0
k,12,0,0.525
k,13,-0.06,0.525
k,14,-0.06,0.22
k,15,-0.16,0.12
k,16,-1.41,0.12
k,17,-1.51,0.22
k,18,-1.51,0.525
k,19,-1.63,0.525
k,20,-1.63,0.22
k,21,-1.73,0.12
k,22,-2.98,0.12
k,23,-3.08,0.22
k,24,-3.08,0.525
k,25,-3.20,0.525
k,26,-3.20,0.22
k,27,-3.3,0.12
a,1,2,26,27
a,2,3,24,25
a,3,4,22,23
a,4,5,21,22
a,5,6,20,21
a,6,7,18,19
a,7,8,16,17
a,8,9,15,16
a,9,10,14,15
a,10,11,12,13
AGEN, ,all, , , ,-0.525, , , ,1
ARSYM,Y,all, , , ,0,0
ARSYM,x,all, , , ,0,0
AGEN, ,all, , , ,-0.035, , , ,1
!拱軸線
k,1101,,-0.56,0
k,1102,,-0.641,-2.53
k,1103,,-0.813,-5.06
k,1104,,-1.295,-7.59
k,1105,,-1.876,-10.12
k,1106,,-2.612,-12.65
k,1107,,-3.526,-15.18
k,1108,,-4.615,-17.71
k,1109,,-5.883,-20.24
k,1110,,-7.335,-22.70
k,1111,,-8.978,-25.3
k,1112,,-10.817,-27.829
k,1113,,-12.861,-30.36

*do,i,1101,1112,1
l,i,i+1
*enddo
我的問題是怎樣建立坐標讓每個截面都垂直于拱軸線

建出的錯誤模型是這樣的