結構靜力分析邊界條件施加方法與技巧——約束實例篇

2016-12-21 by:CAE仿真在線來源:互聯網

ABAQUS對于彎矩和軸力的輸出,是通過定義界面,然后輸出到*.dat文件中去的。實現該功能需要兩個命令配合使用:

1、關于截面的定義:

*Elset, elset=_Surf-5_S4, internal,instance=Part-1-1, generate
47 , 97
*Surface, type=ELEMENT, name=Surf-5
_Surf-5_S4, S4

2、關于截面結果的輸出:

(sof,som,詳細可以在ABAQUS的幫助文件中查詢)

*section print,name=50,surface=Surf-50,axes=local,frequency=1,update=yes
, 2.000000 , 0.5000000
, 1.500000 , 0.5000000
sof,som

上面主要是根據單元定義截面的過程,對于大量的截面定義,可以利用Fortran編寫文本轉換工具,直接生成定義截面和輸出截面的inp文件。

下圖是受均布荷載的懸臂梁的計算示意圖:

結構靜力分析邊界條件施加方法與技巧——約束實例篇abaqus有限元技術圖片1
計算完成之后,在.dat文件輸出的結果內容如下所示:

section name 12
surface name assembly_surf-12
system of coordinates local
update of the local system yes
definition of the local system
->current anchor point coords 78.000 0.50000 0.0000
->current direction cosines of the local axes
axis 1: 0.0000 1.0000 0.0000
axis 2: -1.0000 0.0000 0.0000
axis 3: 0.0000 0.0000 1.0000

note: the above system of coordinates is meaningful only for the sof and som variables.

note: socf is always reported in the global coordinate system. if the dot product of sof
and som is not equal to zero, centroid of the section is reported as socf, and som
is not equal to the cross product of socf and sof.

the following tables are printed

sofm sof1 sof2 sof3 somm som1 som2 som3

2100. -2100. -4.5571e-02 0.000 2.4200e+04 0.000 0.000 -2.4200e+04