Vibration Of The All-terrain-vehicle And Vehicle Dynamics Rocket Launching Weapons

Some researches on launching dynamics response and driving dynamics of military all-terrain vehicle carried rocket launcher were done in the dissertation with intent to improve the firing dispersion and ride comfort of weapon system.First, based on the structural characteristics of the weapon system, the rigid-flexible coupling launch dynamics model for military all-terrain vehicle (ATV) carried rocket launcher was established, in which all of the eight launch tubes, pitch axis and swinging base were treated as the flexible bodies, and the flexible launch tubes, pitch axis and swinging base were generated by the modal reduction method. Through the launch dynamics simulation, obtained the dynamic response characteristics of key components.The feasible methods were studied for improving the firing dispersion of the military ATV carried rocket launcher. The rigid-flexible coupling system dynamics model and initial disturbance calculating program were integrated by the Multi-disciplinary Design Optimization (MDO) software Isight. Applying Design of Experiments (DOE)-guided, and setting the initial disturbance as evaluation, making virtual experiments on different firing order, then getting the most reasonable firing order.The variable interval launch was firstly applied in ATV rocket launching system, defining the seven firing intervals as design variables, and setting the initial disturbance of the rocket as objective function. Integrated the rigid-flexible coupling launch dynamics model of the ATV carried rocket launcher and initial disturbance calculating program by the multi-disciplinary optimization platform Isight, the relationship is built between the variable and response by using approximate model. By using the hybrid optimization strategy, the approximate model was optimized and reasonable firing intervals were got.Based on the rigid-flexible coupling model of weapon system, the random road of C and D were worked out, the time-varying system model of load-vehicle-rocket launcher was built, and the study of traveling vibration was done at different speed and road condition. Based on Optimal Latin Hypercube Design (OLHD), researching how the vehicle performance affected by factors, such as the vehicle suspension system’s stiffness, damping and launcher’s, through the analysis of experimental results, got a set of optimum parameters.