以包含复杂转子系统及支承结构系统的发动机总体模型为研究对象，进行动态特性及动响应分析。为合理解决计算的准确性与经济性之间的矛盾，提出了模态阻抗综合分析法，将整体系统动力学问题化为低阶运动方程求解。应用按本文方法编制的程序对某型航发进行了整体动应力计算，结果与实际相符。 Taking the overall engine model of complex rotor system and supporting structure system as the research object, dynamic characteristics and dynamic response analysis are carried out. In order to reasonably solve the contradiction between the accuracy of calculation and the economy, a comprehensive analysis of modal impedance is proposed to solve the problem of global system dynamics as low-order equation of motion. Applying the program compiled according to the method of this paper, the overall dynamic stress calculation of a certain type of aircraft carrier is carried out. The result is in accordance with the actual situation.