考虑过盈配合与磨损的枢轨接触状态分析
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摘要
在电磁发射过程中,枢轨间的摩擦磨损带来接触界面物质损失导致接触状态发生变化,对发射装置的寿命与性能产生严重影响。对过盈配合的枢轨摩擦磨损进行数值仿真,并比较磨损前后枢轨接触状态。研究不同参数对枢轨接触状态的影响以及枢轨磨损后的表面状态。结果表明:磨损后接触压强分布更加均匀,材料硬度对接触状态影响较大,摩擦因数影响很小。
In the launching process,friction and wear between armature and rails lead to material loss of contact interface and change of contact state,which has a serious impact on the life and performance of the launcher.The contact state of armature and rail before and after wear were analyzed and compared by numerical simulation considering interference fit.The influence of different parameters on the contact state between armature and rails and surface state after wear were studied.The results show that the distribution of contact pressure is more uniform after wear,the material hardness has a great influence on the contact state,the influence of friction coefficient is very small.
In the launching process,friction and wear between armature and rails lead to material loss of contact interface and change of contact state,which has a serious impact on the life and performance of the launcher.The contact state of armature and rail before and after wear were analyzed and compared by numerical simulation considering interference fit.The influence of different parameters on the contact state between armature and rails and surface state after wear were studied.The results show that the distribution of contact pressure is more uniform after wear,the material hardness has a great influence on the contact state,the influence of friction coefficient is very small.
引文
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[3]WATT T,STEFANI F.Experimental and computational investigation of root-radius melting in C-shaped solid armatures[J].IEEE Transactions on Magnetics,2005,41(1):442-447.
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[5]张保玉,黄伟,陈子明,等.高速滑动电接触下轨道槽蚀损伤问题研究[J].兵器材料科学与工程,2015,38(3):140-143.
[6]WOODS L C.The current melt-wave model[J].IEEE Transactions on Magnetics,997,3(1):52-156.
[7]STEFANI F,MERRILL R,WATT T.Numerical modeling of melt-wave erosion in two-dimensional block armatures[J].IEEE Transactions on Magnetics,2005,41(1):437-441.
[8]巩飞,翁春生.电磁轨道炮固体电枢熔化波烧蚀过程的三维数值模拟研究[J].高电压技术,2014,40(7):2245-2250.
[9]林庆华,栗保明.电磁轨道炮瞬态温度场的数值模拟[J].工程热物理学报,2017,38(1):149-154.
[10]STEFANI F,PARKER J V.Experiments to measure wear in aluminum armatures[J].IEEE Transactions on Magnetics,1999,35(1):100-106.
[11]KOTHMANN R E,STEFANI F.A thermal hydraulic model of melt-lubrication in railgun armatures[J].IEEE Transactions on Magnetics,2001,37(1):86-91.
[12]STEFANI F,MERRILL R.Experiments to measure meltwave erosion in railgun armatures[J].IEEE Transactions on Magnetics,2003,39(1):188-192.
[13]PERSAD C,YEOH A,PRABHU G,et al.On the nature of the armature-rail interface:liquid metal effects[J].IEEETransactions on Magnetics,1997,33(1):140-145.
[14]MEGER R A,COOPER K,JONES H,et al.Analysis of rail surfaces from a multishot railgun[J].IEEE Transactions on Magnetics,2005,41(1):211-213.
[15]PERSAD C,CASTRO Z.Railgun tribology:characterization and control of multishot wear debris[J].IEEE Transactions on Magnetics,2006,43(1):173-177.
[16]MEGER R A,CAIRNS R L,DOUGLASS S R.EM gun bore life experiments at naval research laboratory[J].IEEE Transactions on Plasma Science,2013,41(5):1533-1537.
[17]朱仁贵,张倩,李治源,等.强流脉冲下重复滑动电接触界面的电热特性[J].强激光与粒子束,2015,27(5):261-268.
[18]曹海要,战再吉.铜/金刚石复合材料电磁轨道烧蚀特性的实验研究[J].高压物理学报,2016,30(4):317-322.
[19]金龙文,雷彬,张倩,等.电磁轨道炮热生成机理及温度场数值仿真[J].火炮发射与控制学报,2012(4):9-12.
[20]巩飞,翁春生.电磁轨道炮电枢-导轨接触表面状况数值研究[J].南京理工大学学报,2014,38(3):396-401.
[21]陈立学,何俊佳,夏胜国,等.电磁轨道炮轨道电阻率和轨道高度对电流上升沿阶段电枢边沿熔蚀的影响[J].高电压技术,2014,40(4):1071-1076.
[22]关晓存,鲁军勇.脉冲电流作用下枢轨接触面瞬态摩损量计算[J].强激光与粒子束,2014,26(11):231-236.
[23]曹荣刚,苏明,李士忠,等.脉冲大电流高速滑动电接触下轨道槽蚀现象的总结与分析[J].高电压技术,2016,42(9):2822-2829.
[24]乔志明,雷彬,吕庆敖,等.轨道炮枢/轨接触界面温度仿真分析[J].装甲兵工程学院学报,2016,30(04):62-67.
[25]王志恒,万敏,李小将.轨道炮电枢电动力转捩形成机理与仿真分析[J].系统仿真学报,2018,30(3):1090-1095.