Bending stiffness i(11) of beam section is zero; check input data.

liuqi1989

错误信息：Bending stiffness i(11) of beam section is zero; check input data.
Bending stiffness i(11) of beam section is zero; check input data.
2 elements have missing property definitions. The elements have been identified in element set ErrElemMissingSection.
8 elements are close to parallel with their beam section axes. The elements have been identified in element set ErrElemAxisDir.
Analysis Input File Processor 因出错而退出.

警告信息:Output request s is not available for element type b33
Output request s is not available for element type b33
Output request sf is not available for element type b33
Output request sf is not available for element type b33
For 5 beam elements either the average curvature about the local 1-direction differs by more than 0.1 degrees per unit length as compared to the default curvature or the approximate integrated curvature for the entire beam differs by more than 5 degrees as compared to the approximate integrated default curvature. This may be due to a user-specified normal or due to the nodal averaging routine used by Abaqus. This difference may cause unexpected behavior of the beam and you may want to verify that the beam normals are correct for your problem. The elements have been identified in element set WarnBeamCurvature1.
For 4 beam elements either the average curvature about the beam tangent differs by more than 0.1 degrees per unit length as compared to the default curvature or the approximate integrated curvature for the entire beam differs by more than 5 degrees as compared to the approximate integrated default curvature. This may be due to a user-specified normal or due to the nodal averaging routine used by Abaqus. This difference may cause unexpected behavior of the beam and you may want to verify that the beam normals are correct for your problem. The elements have been identified in element set j_WarnBeamTwist.

求高手详细解决下   附上INP文件

liuqi1989

不会吧？  没高手解决下啊

waj3

梁单元特性没定义

liuqi1989

能具体讲下么
3# waj3

liuqi1989

难道这个问题不是问题么？  非常的恳请大家看看  我是新手虽然有点急于求成，但希望各位大大们理解    帮忙看下帖子的问题

liuqi1989

:'(:'(:'(:'(:'(:'(:'看样子我要郁郁而不得终了啊(:'(:'(:'(:'(:'(:'(:'(

seawideyp

2 elements have missing property definitions. The elements have been identified in element set ErrElemMissingSection.% r" I+ q- h: Z& H) }& [! S6 X  {5 R
8 elements are close to parallel with their beam section axes. The elements have been identified in element set ErrElemAxisDir.0 \" v$ @' I. b/ N* T, \
先解决这两条吧
再看看
我接触不到beam

liuqi1989

那麻烦你帮我看下，我真的找不到，哪里没有定义啊
7# seawideyp

tiny0o0

*Beam Section, elset=_PickedSet8, material=Q235, poisson = 0.25, temperature=GRADIENTS, section=PIPE
0.54, 0.04
0.,0.,-1. ×××××此处你全部用了这个0,0,-1
Bending stiffness i(11) of beam section is zero，说明你的某些梁单元轴向与0,0,-1平行了或者太接近了，改成别的就没有这个问题了。

liuqi1989

我先试试~ 9# tiny0o0