ABAQUS的随机振动，总会出现关于曲率的警告？
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利用ABAQUS的显示动力，我做一个U形管的激振模拟，总是出现这个警告，有哪位大神能指点一下，是什么原因吗？
For 730 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.
请问是模型原因吗
![ANSYS/ABAQUS使用(带孔平板拉伸实例)[初识有限元CAE分析]](https://img.jishulink.com/cimage/0c683776c596fd2f7dde46fd773a666b_cdn.jpg?image_process=resize,fw_576,fh_320,)
beam的local 1-direction就是梁的轴线方向，也即是normal方向，在梁的normal方向定义那里检查一下是否正确的定义了轴线方向。property模块。