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本文提出了一种以节段模型受到初始脉冲激励后的自由振动的阻尼和频率作为基本参数，在时域内识别二元非流线型体颤振导数的方法。在这一方法中，非耦合导数的确定与常规的方法没有根本的不同，而耦合导数是在指定的折算风速下根据各主振方向上的模型参数以及相应的非耦合导数通过求解非线性代数方程组得到。与目前常用的Ｓｃａｎｌａｎ方法相比，略去了实验必需的纯单一模态振动的要求，从根本上减少了对风洞实验技术的要求和工作量，而且识别精度有明显的提高。
In this paper, we propose a method to identify bivariate non-streamlined body-fibrillation derivatives in the time domain, using the damping and frequency of free vibration after the initial pulse excitation of the segment model as the basic parameter. In this method, the determination of uncoupled derivatives is not fundamentally different from that of conventional methods. The coupled derivatives are obtained by solving the nonlinear algebra based on the model parameters in each principal vibration direction and the corresponding uncoupled derivatives at the specified converted wind speed The equations are obtained. Compared with the commonly used Scanlan method, the requirement of experimentally pure single mode vibration is omitted, the requirements and workload of wind tunnel experiment technique are reduced fundamentally, and the recognition accuracy is obviously improved.