发射药床挤压破碎动力学仿真  

Dynamic Simulation for Propellant Bed with Press and Fracture

作　　者：洪俊[1] 芮筱亭[2] 费庆国[1] 

机构地区：[1]东南大学工程力学系,南京210096 [2]南京理工大学,南京210094

出　　处：《系统仿真学报》2010年第4期1018-1021,共4页Journal of System Simulation

基　　金：国家自然科学基金(10902024);航空科学基金(20090869009)

摘　　要：低温发射药床挤压破碎是导致膛炸的根本原因。将建立在离散单元法基础上的弹簧-球单元破碎模型应用到散粒体系统动力学仿真中,建立了伴随破碎的散粒体系统动力学仿真方法。将该方法应用到动态压缩装置中的发射药床挤压破碎的数值仿真中,并对破碎后的发射药床表面积增加量进行了统计。数值仿真结果与试验结果基本一致,说明数值仿真的正确性,为进一步研究发射装药发射安全性提供了理论基础。Press and fracture of propellant bed under low temperature is the fundamental reason of breech blow. Spring-sphere fracture model based on Discrete Element Method was used for dynamic simulation of granular system. The dynamic simulation method of granular system with part grain＇s fracture was set up. This method was used to simulate press and fracture of propellant bed in dynamic press device. The increment of propellant bed＇s area was statistic. The result of simulation has good agreement with the result of test. This proves the validity of simulation. The method is theoretic foundation for ulterior studying launch safety of gun propellant charge.

关 键 词：发射药床 散粒体系统 破碎 离散单元法 仿真 

分 类 号：TJ41[兵器科学与技术—火炮、自动武器与弹药工程]