导弹横向弯曲振动特性的计算

COMPUTATION OF THE LATERAL BEND VIBAATION CHARACTERISTICS OF THE MISSILE

本文给出了分析导弹弹体含有内部结构梁的横向弯曲振动特性的计算方法,特别是可用来计算导弹内部结构梁的局部振动频率和模态。文中给出了带有集中质量的铁木辛柯梁单元的传递矩阵和弹体含有内部结构梁的传递矩阵,分析了发动机药柱质量对弹体振动特性的影响。用本文方法计算某型号弹的横向弯曲振动特性,计算结果与试验测量值较一致。

An analytical method is presented in this paper for calculating the lateral bend vibration characteristics of the missile including the inner structure beam in the missile body. Specially, it is used for calculating the local vibration frequencies and mode-shapes of the inner structure beam of the missile body. In the paper, it is given the transfer matrices of the “S. Timoshonko-beam” element having lumped quantities and the missile body including the inner structure beam, and analyzed that the effect of the masses of the propel-lant grain of the solid-propellant motor to vibration characteristics of the missile body. It is found in this paper that the lateral bend vibration characteristics of some missile, the computational results shown good general agreement with experimental results.