超高速滑动界面机械接触性能研究  

Mechanical contact characteristics of hypervelocity sliding surface

作　　者：杨日辉[1] 李鹤[1] 郭刚虎[1] 张向锋[1] 

机构地区：[1]中国人民解放军驻七四三厂军代室,山西太原030027

出　　处：《兵器材料科学与工程》2015年第5期67-71,共5页Ordnance Material Science and Engineering

摘　　要：电磁轨道炮发射弹丸过程中,电枢和轨道之间处于超高速滑动摩擦的接触状态,不同的接触参数对界面间的接触性能会产生显著的影响。建立枢轨间高速滑动摩擦的二维模型,利用有限元软件LS-DYNA对超高速滑动过程进行数值计算,分别研究不同枢轨材料、摩擦因数和滑动速度等参数下枢轨界面的接触性能变化。得出提高电枢滑动速度、提高轨道屈服应力、减小摩擦因数等能够有效减少轨道的损伤。In the process of projectile launching by railgun, armalure slides on rail surface al hypervelocity, different contact paramelers can largely influence the contact characteristics on the interface between rail and armature. A 2-D simulation model of hypervelocity sliding friction between rail and armature was established to simulate the sliding process by finite element software LS-DYNA. Different rail/armature material, friction coefficient, sliding speed are numerically ealculated to analyze the contact surface characteristics. From the calculated results, it is pointed out that higher armature speed, higher yiehl strength of rail anti lower friction coefficient are helpful to decrease the rail damage.

关 键 词：超高速滑动 接触性能 LS—DYNA 数值计算 

分 类 号：TJ399[兵器科学与技术—火炮、自动武器与弹药工程]