Error beam xxxx has zero area

阿拉喵喵

报错
*** Error beam    11943 has zero area

*** Error beam    11944 has zero area

*** Error beam    11945 has zero area

*** Error beam    11946 has zero area

*** Error beam    11947 has zero area

*** Error beam    11948 has zero area

K文件 beam 截面定义
*SECTION_BEAM
         6         1    1.0000       2.0       0.0
0.120E-01 0.120E-01  0.00      0.00      0.00      0.00  

这是为什么呢？ 谢谢！

长脚

ELFORM Element formulation options:
EQ.1: Hughes-Liu with cross section integration (default),
EQ.2: Belytschko-Schwer resultant beam (resultant),
EQ.3: truss (resultant), see remark 2.
EQ.4: Belytschko-Schwer full cross-section integration,
EQ.5: Belytschko-Schwer tubular beam with cross-section
integration,
EQ.6: discrete beam/cable,
EQ.7: 2D plane strain shell element (xy plane),
EQ.8: 2D axisymmetric volume weighted shell element (xy plane),
EQ.9: spotweld beam, see *MAT_SPOTWELD.
EQ.11: integrated warped beam
EQ.12: resultant warped beam
EQ.13: small displacement, linear Timoshenko beam with exact
stiffness.
Note that the 2D and 3D element types must not be mixed, and different
types of 2D elements must not be used together. For example, the plane
strain element type must not be used with the axisymmetric element
type. In 3D the different beam elements types, i.e., 1-6 and 9 can be
freely mixed together.

remark2:For the truss element, define the cross-sectional area, A, only.
1、你定义的beam参数有点小问题。主要问题是第二项ELFORM。在你的k文件中定义的为1。下面提供两种解决方法，仅供参考。
2、方法一，修改ELFORM参数，把1改成最近常见的3（杆），求解成功。
3、方法二，ELFORM依然为1，这个时候修改其他的参数（与面积相关的参数），这个时候第二张card上的A       ISS       ITT       IRR 都要设置，求解成功！                          

tianyuanjjx

受教

weian

长脚 发表于 2012-1-9 20:21
ELFORM Element formulation options:
EQ.1: Hughes-Liu with cross section integration (default),
EQ.2: ...

多谢啊啊

weian

长脚 发表于 2012-1-9 20:21
ELFORM Element formulation options:
EQ.1: Hughes-Liu with cross section integration (default),
EQ.2: ...

beam可以用神马材料呢我去看看