本文对无粘跨音速流中作俯仰振动的细长旋成体,给出了一种计算表面非定常压力分布和动稳定性导数的近似方法,即用时间线化近似,在引入局部线化假设后,将跨音速小扰动方程化为一个积分方程,并用精确物面边界条件求数值解。本方法算例与其它理论和实验结果作了比较,表明用它可以得出较合理的结果。 In this paper, we give an approximate method for calculating the unsteady pressure distribution and the dynamic stability derivative of slender bodies that do pitch vibration in non-viscous transonic flow. That is to say, using the time-line approximation, Then, the transonic small perturbation equation is transformed into an integral equation, and the numerical solution is obtained by using the exact object boundary conditions. The method example is compared with other theoretical and experimental results, indicating that it can be used to obtain more reasonable results.