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.
Journal of Astronautics
Missile, Vibration, Transfer matrix.