Since the damping matrix in the motion equation of damped blade is no longer decoupled as Rayleigh damping, so the complex mode theory is introduced in this paper to overcome the difficulty.

由于带阻尼围带或凸肩叶片(以下简称阻尼叶片)的运动方程中的阻尼矩阵是非解耦的矩阵，只有引入复模态理论才能圆满解决其特征问题的求解。

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Damped least-squares method can work successfully at a relatively poor initial value, and it can overcome the recurrence difficulty caused by the singular coefficient matrix.

阻尼最小二乘法在较差的初值条件下能有效运行，并能克服系数矩阵奇异时的迭代困难。

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