关键词: 固体火箭发动机;结构振动;结构动力学

Abstract: A analytical method of sensitivity of frequency is used to obtain the formula of sensitivity for high length-diameter ratio solid rocket motor by using beam model. Sensitivity for low length-diameter ratio motor is analyzed by using finite element model with simplified method,Some sensitivity characteristics of these two type of motors are obtained,e.g,the various order sensitivities of frequency is in constant ratio for the beam model, and ind-ependant of structural parameters of motor.

Key words: Solid rocket engine;Structural vibration;Structural dynamics