【摘要】 本文运用固有频率灵敏度分析方法,把长细比较大发动机简化为梁模型,推导出其固有频率灵敏度计算公式;对于长细比较小发动机必需采用有限元模型,本文采用简化方法,进行固有频率灵敏度分析,并归纳出两种发动机的灵敏度特性.更多还原

【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.更多还原