A Multi-barrel Rocket Launcher Device Structural Dynamics Simulation And Dynamic Characteristics Of Optimization

According to the basic content of dynamical analysis, the thesis focus on the dynamic simulation of Multiple Rocket Launcher by ABAQUS with the theory of structure dynamics and nonlinear finite element analysis method, in order to realize the inherent characteristic and verify its reliability such as the stiffness and intensity, the collision between missile and muzzle and so on. On the basis of the dynamic simulation analysis, taking differrent control method improve the dynamic property of Multiple Rocket Launcher, so as to reduce initial disturbance , advance launch accuracy and carry out the structure dynamic design.Main work in this thesis is as follows:①Reasonable simplified nonlinear finite element model of Multiple Rocket Launcher is built, its modal is studied in order to realize the inherent characteristic, find out the weak part of launcher and achieve the resonance analysis.The mode analysis lay the foundation for the oscillation analysis and taking efficient measure to reduce initial disturbance and rocket dispersion.②In response to three different working purpose of Multiple Rocket Launcher(the aiming state,the launching state,the march state), the stiffness and intensity of the structure is researched to verify its reliability. In addition, the collision between missile and muzzle is checked out.③According to effect of the different structure parameter of launching guider for the initial disturbance, resonable structure parameter value is obtained. In this way, the dynamic characteristic of Multiple Rocket Launcher and the launch accuracy is all improved.④Setting the rational firing interval make its dynamic feature better.By the study of the attenuation of guider nozzle oscillation, the rational launching interval is getted,which is also tested by the research of string firing and the matching relation between launching frequency and natural oscillation frequency(in launching).⑤Overcoming the disadvantages in the preliminary design of director rifling angle, with full consideration of the influence of variable disturbing factor for dispersion ,the reasonable value of rifling angle, which satisfy the tactical and technical density performance index ,will be acquired through the mean-square deviation of initial disturbance.