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发表于 2009-6-10 08:23:33
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来自 广东深圳
本帖最后由 海纳百川 于 2009-6-10 08:43 编辑
要批评人也得先给出问题的答案吧,帮助文档加引号搜索那是谁都知道的事。
楼上的我想应该是ABAQUS高手了,下面是abaqus帮助文档说明,想请问下答案在哪里?
本人比较愚钝,望告知。
Modal effective mass
The effective mass for mode associated with kinematic direction i (, 2, , 6) is defined as
If the effective masses of all modes are added in any global translational direction, the sum should give the total mass of the model (except for mass at kinematically restrained degrees of freedom). Thus, if the effective masses of the modes used in the analysis add up to a value that is significantly less than the model's total mass, this result suggests that modes that have significant participation in a certain excitation direction have not been extracted.
Modal participation factors
The participation factor for mode in direction i, , is a variable that indicates how strongly motion in the global x-, y-, or z-direction or rigid body rotation about one of these axes is represented in the eigenvector of that mode. The six possible rigid body motions are indicated by , 2, , 6. The participation factor is defined as
————————我只是想知道问题的答案 |
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