Research On The Lightweight Of A Vehicle-mounted Multiple Rocket Launcher Based On Dynamic Analysis

Using the vehicle-mounted multiple rocket launcher as the research object in this article and focusing on the important components such as landing gear,the rotary device and the launch-box.By analyzing different design methods of lightweight,determining the lightweight method that using the lightweight material to replace the previous material and making topology optimization of the landing gear and the rotary device.First,the lightweight material was applied on launch-box.The original steel was replaced by the aluminum alloy material.A new structure of launch-box was designed and take analysis of the conditions on launching,marching,stacking and lifting.The analysis results show that the box of the new aluminum alloy material meets the requirements of stiffness and usage.The mass of new launch-box is 135kg,which is 47kg less than the original steel,decreasing by 25.8%.By simplifying and establishing the finite element analysis model of the vehicle-mounted rocket system.Making the simulation analysis of the vehicle-mounted rocket launcher under the three conditions,such as rapid braking and two conditions of extreme angle firing.According to the results,to analysis the safety of the vehicle-mounted rocket system and the division of stress and displacement of the important components under several working conditions.The analysis results show that the vehicle-mounted rocket launcher is safe in these conditions,and there have space for optimization on the structure of the landing gear and the rotary device.According to the topological optimization theory of variable density method,a mathematical model of the landing gear and rotary device topological optimization is established.By using the finite element ABAQUS/ATOM module,a analysis model of topology optimization which is a single target and multi-constraint conditions is established to optimize the landing gear and rotary device at the same time.Optimizing two components at the same time is an innovation of this article.According to the optimization results to make structural improvement design and verification analysis.The results show that after the optimization,the weight of the landing gear is reduced by 40kg and decreasing by 8.51%.The weight of the rotary device is reduced by 21kg and decreasing by 6.45%.