nLgeom打开后，在后继的step中如何使用模态叠加法

jacobi

咨询下，
在step1打开了nLgeom，
但在后继的STEP2动力分析中想用模态叠加法，不知道如何实现？谢谢
因为help说是无法关闭nLgeom的：
Once you include geometric nonlinearity in a step, it is considered in all subsequent steps. If
nonlinear geometric effects are not requested in a subsequent step, Abaqus will issue a warning
stating that they are being included in the step anyway.

意思就是我想用step1结束后的切线刚度矩阵
进行后继的STEP2线性动力分析