请赐教（ansys)：两个弧形面板的分析的命令流，二者只有厚度不同！
推荐回答（1个）
我会尽快回复你的问题！稍等！
你的模型二与1没有什么区别啊，但是单元实参设置中的单元厚度差别太大了，这样就导致bending moment of inertia 太大了，所以默认设置中的一些量就没有办法来调节计算的刚度问题，所以可以对这方面来设置，ANSYS提供了RMI 这个实常数来控制它的变化速率，
因此，模型而就可以改为以下的设置，改变中的2，已经是大于默认的1了，这样就满足单元厚度关系，至于RMI的说明，可以参考下面的英文说明!
模型二
/prep7
uimp,1,dens,ex,prxy,2.56e-5,71700,0.2
et,1,63
r,1,8,8,8,8
rmore,2
之后就不用改了....
For certain nonhomogeneous or sandwich shell applications, the following real constants are provided: RMI is the ratio of the bending moment of inertia to be used to that calculated from the input thicknesses. RMI defaults to 1.0. CTOP and CBOT are the distances from the middle surface to the extreme fibers to be used for stress evaluations. Both CTOP and CBOT are positive, assuming that the middle surface is between the fibers used for stress evaluation. If not input, stresses are based on the input thicknesses. ADMSUA is the added mass per unit area.
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