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建立了落球试验装置,并用该装置模拟了火工品发射时所承受的过载环境。通过落球碰撞试验得到了过载加速度随板厚和落高的变化曲线,以及过载加速度脉宽随板厚和落高的变化曲线;此外,应用有限元分析方法和ANSYS/LS-DYNA软件对落球过载环境进行了数值模拟,得到了火工品组件上(钢板)的过载加速度——时间曲线、应力分布图。结果表明,模拟结果与实际试验结果一致性较好,落球碰撞试验适用于模拟火工品发射时的过载环境,研究结果为落球碰撞试验装置的优化设计提供了参考和依据。
The falling ball test device was established and the device was used to simulate the overload environment that the explosive was exposed to. The curve of overload acceleration with plate thickness and falling height was obtained by falling ball collision test and the curve of overload acceleration pulse width with plate thickness and falling height. In addition, finite element method and ANSYS / LS-DYNA software Environment were numerically simulated, and the overload acceleration-time curve and stress distribution diagram of the plate were obtained. The results show that the simulation results are in good agreement with the actual test results. The falling ball collision test is suitable for simulating the overload environment when the explosive is fired. The research results provide reference and basis for the optimization design of falling ball impact test apparatus.