摘要
电磁轨道炮炮膛装配精度直接影响到发射过程中枢轨滑动电接触状态,为分析炮膛装配精度对电枢动态发射的影响,基于炮膛间距实测数值,提取炮膛间距典型变化形态,并建立典型形态下电枢内弹道发射动力学模型,理论分析了炮膛尺寸变化在发射过程中对电枢受力、振动等的影响,并通过真实工况下的动态发射试验和枢轨静态滑动接触试验对理论分析结论进行验证。研究结果表明,膛间距的随机变化可导致发射过程中电枢和轨道处于非对称接触状态,在膛间距变小时,枢轨接触区域会经历由小变大的过程,这一过程有利于增大枢轨接触区域,当膛间距增大时,枢轨接触区域逐渐减小,造成局部面积通过电流过大,当内膛装配精度误差超过0.2 mm以上时,由此引起的内膛间距波动可导致发射过程中电枢受力不均,同时对电枢产生横向附加振动,这是导致电枢膛内高速运动而解体的主要原因之一。通过分析炮膛装配精度对电枢发射过程的影响,研究结果可以有效指导枢轨匹配性设计,对促进电磁炮未来工程化应用意义显著。
The assembly accuracy of electromagnetic rail-gun barrel directly affects the sliding electrical contact state of the central rail during the launch process.To analyze the impact of barrel assembly accuracy on the dynamic launch of the armature,typical changes in barrel spacing were extracted based on the measured values of barrel spacing,and a dynamic model of armature internal ballistic launch under typical shapes was established.The impact of barrel size changes on the force and vibration of the armature during the launch process was theoretically analyzed.The theoretical analysis conclusions were verified through dynamic launch tests under real working conditions and static sliding contact tests on the pivot rail.The research results indicate that the random variation of bore spacing can lead to asymmetric contact between the armature and the track during the launch process.When the bore spacing decreases,the contact area between the armature and the track will undergo a process of increasing from small to large.This process is beneficial for increasing the contact area between the armature and the track.As the bore spacing increases,the contact area between the armature and the track gradually decreases,causing excessive current to flow through the local area.When the assembly accuracy error of the bore exceeds 0.2 mm,the caused fluctuation in the spacing between the inner chambers can lead to uneven force distribution on the armature during the launch process,and also generate lateral additional vibration on the armature,which is one of the main reasons for the high-speed movement and disintegration of the armature chamber.Analysis on the impact of gun bore assembly accuracy on the armature launch process is of great significance for effectively guiding the design of armature rail matching and promoting the future engineering application of electromagnetic guns.
作者
裴朋超
曹斌
王普毅
葛霞
王东东
PEI Pengchao;CAO Bin;WANG Puyi;GE Xia;WANG Dongdong(Northwest Institute of Mechanical and Electrical Engineering,Xianyang 712099,China)
出处
《弹道学报》
CSCD
北大核心
2024年第1期35-40,共6页
Journal of Ballistics
基金
咸阳市重大科技创新专项(L2023-ZDKJ-JSGG-GY-016)。
关键词
轨道炮
炮膛装配精度
滑动电接触
炮膛形态
动态发射
rail-gun
bore assembly accuracy
sliding electrical contact
chamber shape
dynamic launching
