摘要
采用特定孔隙结构泡沫铝垫片以冲击隔离方式实现引信在前冲过载下的缓冲保护,基于数值仿真方法开展了缓冲有效性分析。建立某型火箭弹侵彻三层混凝土靶标数值仿真模型,通过引信过载仿真曲线与试验结果对比校核数值模型,数值方法分析了不同泡沫铝类型和缓冲结构对引信过载的弱化作用。结果表明:泡沫铝可有效降低引信过载,孔隙率和厚度存在最佳设计值使其缓冲效率达到最高;泡沫铝夹层结构对引信保护效果更佳,其结构特性可有效减弱或避免高过载下单层泡沫铝易被压实失去保护作用的问题。研究成果为引信结构尤其缓冲结构的设计提供参考。
Buffering protect of fuze under high-speed impact was realized using aluminum foam gasket with special pore structure, and numerical simulation method to achieve the buffer validify analysis. Numerical model of three-layered concrete target projectile penetration was established, and the numerical model was validated to be accurate by comparing the fuze acceleration curves of simulation and experiment results. Numerical simulations were completed to predict the cushioning effect for different foamed aluminum structures The result reveals that foamed aluminum cushioning can reduce the load of the fuze~ and the foam＇s void ratio and thickness will significantly affect the cushioning performance, and exits a best design value to achieve the highest efficiency. Furthermore, the foamed aluminum sandwich structure has a better cushioning performance than monolayer foam, their special structure can effectively weaken or avoid the problem which single-layer aluminum foam may easily lose protect function due to compaction. The research results can provide design reference for fuze especially buffer structure.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2017年第6期1311-1316,共6页
Journal of System Simulation
基金
国家自然科学基金(51105132
U1604135)
河南科技大学研究生创新基金(CXJJ-ZR11)
关键词
数值仿真
侵彻
缓冲
泡沫铝
numerical simulation
penetration
cushioning
foamed aluminum
