基于刚性动网格技术,建立了俯仰动导数的非定常数值计算方法.首先使用小幅度强迫俯仰振荡方法求解俯仰组合动导数,然后利用小幅度强迫升沉振荡方法求解洗流时差导数,通过两者相减即可得到俯仰阻尼导数.利用国际动导数标准模型Finner导弹进行算例验证,计算得到的俯仰组合动导数与试验值误差为2.76%,洗流时差导数值约为俯仰阻尼导数的11.5%,与文献的结果一致.结论表明:动导数单独模拟方法具有较好的工程实用价值,且可以推广到横向以及航向的动导数数值模拟. Based on the rigid moving mesh technique, a method of unsteady numerical calculation of pitch dynamic derivative is established. The method of small amplitude forced pitch oscillation is used to solve the pitch combination kinematic derivative, and then the small amplitude forced oscillating oscillation method is used to solve the time differential derivative. And the derivative of pitch damping can be obtained by the subtraction.The error of the calculated pitch combination kinematic and experimental values ​​is 2.76% using the Finner missile with international moving derivative standard model, and the derivative value of the time difference is about 11.5 %, Which is consistent with the results in the literature.The conclusions show that the single derivative method of dynamic derivative has good engineering practical value and can be extended to the numerical simulation of dynamic derivative of transverse and heading.