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.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2015年第5期67-71,共5页
Ordnance Material Science and Engineering
关键词
超高速滑动
接触性能
LS—DYNA
数值计算
hypervelocity sliding
contact characteristics
LS-DYNA
numerical calculation
