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
问题是这样的：
2 C+ ]0 S% I7 o! a- n% D. h# I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
!桁架分析
. G8 ^- @  R1 vFINISH$/CLEAR$/PREP7
!方铝截面
ET,1,BEAM4
R,1,0.902E-4,0.534E-8,0.534E-8,0.02,0.02
7 j2 q- w/ f2 J4 bMP,EX,1,6.9E10
MP,PRXY,1,0.33
6 ^4 ], p, Y- W* Q* b8 ?MP,DENS,1,2900
SECTPYE,1,BEAM,HREC
SECDATA,0.02,0.02,0.0012,0.0012,0.0012,0.0012
!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
L,1,2$L,2,6$L,4,7$L,2,7$L,5,7
/ [3 P+ h8 P$ u& d# lK,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$K,16,0.680,-0.120,-0.360
6 U" Q% m2 O+ q9 r; {L,1,9$L,3,10$L,6,11$L,9,12$L,12,11$L,13,15
3 z" e  u$ x/ o7 z. o" iL,3,10$L,12,15$L,14,15
- \9 l, S- N3 M; sL,8,16
K,17,0.356,-0.060$K,18,0.356,-0.060,-0.360
" r( M& d9 Z1 G8 iL,17,18
K,19,1,0,-0.180
4 G' P# @2 }7 N+ ^!分网
/ t# e& D( P( E$ i0 l5 P9 YLESIZE,ALL,,,10
9 m- T( Z9 D' ~( O6 \5 qLMESH,ALL
* ?/ v. q# l2 D8 SFINISH
" j3 K; a( O- j4 e% q6 g
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
% [' ^: u+ ?4 b1 `. ~在线急等