等导重特征值的阻尼摄动

Weak damping perturbation with a repeated eigenvalue of equal first derivatives

推导了原结构有等同一阶导数的重特征值的小阻尼摄动法，这是约束广义逆算法在弱阻尼振系中的推广．

A perturbation technique is developed for dynamic structures with weak damping. The present method can be used to deal with repeated eigenvalues of equal first derivatives.