关于ansys14.5的空间桁架

懒趴趴的熊

初学ansys，各种不懂。想做一个空间桁架受力分析，然后代码写了，导入ansys后加载，实常数，单元类型，材料属性都定义了，就是不求解，也查不到错，求大神们指教T^T
) c0 ?5 m K( N j问题是这样的：
% |! k' x. F: m* G+ G线L1，L9受Y负方向的均布载荷1000N/m，关键点7,15,19全约束，受重力场的影响下看它的变形和应力。
这个是我写的APDL代码
# t/ B; R% c7 L7 G. Z- o1 A!桁架分析
& u& r# y" p) P" SFINISH$/CLEAR$/PREP7
!方铝截面
ET,1,BEAM4
$ B2 R T/ }- U) TR,1,0.902E-4,0.534E-8,0.534E-8,0.02,0.02
t! } A# ^6 rMP,EX,1,6.9E10
& W1 q* H0 r2 H: m. x( N; p; BMP,PRXY,1,0.33
MP,DENS,1,2900
j. l* g5 b( F/ n1 Y" N* D6 SSECTPYE,1,BEAM,HREC
SECDATA,0.02,0.02,0.0012,0.0012,0.0012,0.0012
$ P9 T! n8 L, R( z6 v, f!桁架线体模型
K,1$K,2,0.140$K,3,0.360$K,4,0.680$K,5,0.930$K,6,1
K,7,0.680,-0.150$K,8,0.680,-0.120
( J* E: l8 Y$ v4 Z% gL,1,2$L,2,6$L,4,7$L,2,7$L,5,7
m+ `1 P* K9 l* GK,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
K,15,0.680,-0.150,-0.360$K,16,0.680,-0.120,-0.360
' f* \7 {+ L" _L,1,9$L,3,10$L,6,11$L,9,12$L,12,11$L,13,15
L,3,10$L,12,15$L,14,15
L,8,16
3 H& G3 f2 F- G% H% V% tK,17,0.356,-0.060$K,18,0.356,-0.060,-0.360
L,17,18
M, f/ O# ?9 U$ e' fK,19,1,0,-0.180
, d+ h1 C, F% p!分网
' C1 O* P/ Y3 m2 v) O) @LESIZE,ALL,,,10
LMESH,ALL
FINISH

" s- B( B/ [# X3 }究竟是ansys14的BEAM单元的问题还是我自己的问题，反正我就是不能用梁单元在ansys里求解。用solid95单元的话，这个结构分网困难，难以计算，简化就不求解，求给位大神指点，小弟感激不尽T^T
$ @! J/ K: Y, J' R在线急等
" P6 }# ]! w" Q- @, J& W3 Y3 u