摘要
基于势流理论,建立弹体边界元模型,研究了弹体刚体运动、弹性振动引起的附加质量随弹体浸湿长度的变化规律,以及砰击力的变化。并在结构多自由度系统运动方程中计及附加质量的变化影响,得到附加质量变化不仅引起系统质量阵变化,还将影响阻尼系数阵。
Based on the potential flow theory, the boundary element model of a missile was built and the variation of the additive mass induced by both rigid body motion and elastic vibration was studied. Besides, the influences of additive mass on slamming force and kinematic equation of structure were investigated. The numerical results show that not only the mass matrix but also the damping coefficient of the system are affected.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第14期171-176,共6页
Journal of Vibration and Shock
基金
国家自然科学基金重点项目(50939002)
国家自然科学基金青年项目(51009035)
国防基础科研计划(B2420110011)
关键词
弹体落水
砰击力
附加质量
附加质量变化率
阻尼
missile entering into water
slamming force
additive, mass
variation of additive mass
damping
