關(guān)于ansys14.5的空間桁架

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初學(xué)ansys，各種不懂。想做一個空間桁架受力分析，然后代碼寫了，導(dǎo)入ansys后加載，實常數(shù)，單元類型，材料屬性都定義了，就是不求解，也查不到錯，求大神們指教T^T
問題是這樣的：
7 p5 D! y6 s! V線L1，L9受Y負(fù)方向的均布載荷1000N/m，關(guān)鍵點7,15,19全約束，受重力場的影響下看它的變形和應(yīng)力。
這個是我寫的APDL代碼
  H/ d, ]; [  r- z/ n!桁架分析
FINISH$/CLEAR$/PREP7
!方鋁截面
ET,1,BEAM4
R,1,0.902E-4,0.534E-8,0.534E-8,0.02,0.02
( T1 Z/ A- C0 rMP,EX,1,6.9E10
MP,PRXY,1,0.33
MP,DENS,1,2900
SECTPYE,1,BEAM,HREC
" g1 X; d9 F6 V5 |SECDATA,0.02,0.02,0.0012,0.0012,0.0012,0.0012
!桁架線體模型
9 X. E3 U3 a  N3 A" T1 `K,1$K,2,0.140$K,3,0.360$K,4,0.680$K,5,0.930$K,6,1
, a2 w# j) P( e1 w, e0 oK,7,0.680,-0.150$K,8,0.680,-0.120
L,1,2$L,2,6$L,4,7$L,2,7$L,5,7
: _8 l9 x, \* k; BK,9,0,0,-0.360$K,10,0.360,0,-0.360$K,11,1,0,-0.360
K,12,0.140,,-0.360$K,13,0.680,0,-0.360$K,14,0.930,0,-0.360
& _' _$ G! r! W1 V% {, S1 bK,15,0.680,-0.150,-0.360$K,16,0.680,-0.120,-0.360
L,1,9$L,3,10$L,6,11$L,9,12$L,12,11$L,13,15
# j8 Y6 Y4 a0 s7 N  I0 U) `' YL,3,10$L,12,15$L,14,15
L,8,16
2 X1 H+ ]+ R# p5 ?K,17,0.356,-0.060$K,18,0.356,-0.060,-0.360
L,17,18
2 L( f  v, w( g. V' D; pK,19,1,0,-0.180
!分網(wǎng)
3 j! l' ]% U( y! P4 l1 J* DLESIZE,ALL,,,10
6 I; Z; d8 s4 x$ P* PLMESH,ALL
FINISH

究竟是ansys14的BEAM單元的問題還是我自己的問題，反正我就是不能用梁單元在ansys里求解。用solid95單元的話，這個結(jié)構(gòu)分網(wǎng)困難，難以計算，簡化就不求解，求給位大神指點，小弟感激不盡T^T
在線急等
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