提出了一种改进的等效线性化方法。

The equivalent linearization method is widely used in nonlinear dynamics, especially for qualitative analysis.

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与分段等效线性化方法相结合，也可用于某些非线性系统的响应计算。

Combined with the piecewise linearization, it can be used to compute the response of some nonlinear system.

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应用等效线性化方法得到方程组的线性化刚度矩阵，给出了结构等效一阶频率的计算方法；

Then, an equivalent linearization method is applied to get its linearized stiffness matrix. The estimating method for the equivalent fundamental frequency of the membrane is deduced.

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