导弹振动的动力学建模和频率分析

o investigate the vibration of flexible missile, the dynamics modeling and frequency analysis were conducted by taking the missile as a free-free beam with axial velocity and axial thrust. The system dynamic equation was firstly established based on the Hamilton principle, then the natural frequencies of the system were deduced using the complex-mode method, and subsequently the effect of axial force, axial velocity and aerodynamic force on the system performance was presented. In the simulations, the proposed model was compared with the conventional model. Simulation results show that axial velocity and axial force may lead to a decrease of vibration frequencies of the system, and the system stability shows a descending trend along with the increase of axial velocity and axial force.