摘要
贮箱内的液体晃动会影响航天器的稳定性。为抑制液体晃动，常在贮箱内布置一些隔板。研究了圆柱形贮箱内液体晃动和弹性隔板振动的耦合问题。在研究中考虑了自由液面边界条件，由于流体和弹性隔板的耦合边界条件比较复杂，在理论分析上有较大的困难。对防晃隔板的上下两部分中的液体分别采用不同的速度势函数，首次利用双势函数导出了耦合频率的方程。通过数值计算得到了基频随隔板位置及刚度变化的规律。
? The liquid sloshing in the tank has an effect on the stability of spacecrafts. Some slosh baffle are often installed in the tank for damping liquid slosh. The coupled oscillations of liquid in a cylindrical tank with elastic damping spacer is investigated. The free surface condition is considered in the study. because of the complicacy of the coupled boundary value problem of liquid and elastic damping spacer, there are great difficulties in using analytical methods. Two different velocity potential functions corresponding respectively to the liquid above and below the damping spacer are assumed. The coupled frequency equation is obtained by using double velocity potential functions. Through numerical computation and theoretic analysis, it is shown that the natural frequency changes according to the location and stiffness of the spacer.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第8期26-28,共3页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金项目(19332020)
高等学校博士学科点专项科研基金资助项目(9300334)
关键词
液体晃动
耦合频率
充液航天器
liquid sloshing
coupled frequency
liquid-filled spacecraft
