摘要
依据双渐进法建立研究弹性结构入水砰击过程中弹性效应的数值方法。在弹性结构入水瞬态砰击过程中,自由液面速度势满足自由液面的非线性条件,并通过考虑结构运动非线性的伯努利方程将流体域控制方程与结构弹性动力响应方程耦合求解,计算结果与试验结果进行了比较分析。结果分析表明,流固耦合效应对弹性结构入水砰击载荷及结构弹性动力响应影响不可忽略。圆柱体倾斜入水过程中水平、垂向合力在头部入水和尾部入水时刻出现两个峰值;入水角度对船舶入水砰击安全性至关重要。
Based on the double asymptotic approximation （DAA）method,a numerical method to study the effect of an elastic structure during its water-entry slamming was built.During transient slamming of an elastic structure water entry,the velocity potential of free surface satisfied the nonlinear condition of free water surface,Bernoulli equation considering nonlinear structural movement was used to solve the control equations of fluid field coupled with the dynamic response equations of the elastic structure.The computed results were compared with the test ones.The results showed that the fluid-solid coupling effect has a certain influence on the slamming load and the elastic dynamic response of the structure during its water entry;the horizontal and vertical forces exerted on a cylinder have two peaks during its tilt water entry;the angle of water entry is very important to the safety of a ship’s water entry slamming.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第19期28-34,共7页
Journal of Vibration and Shock
基金
国防基础科研基金资助项目(B2420110011)
国家自然科学基金项目(11202057
51009035)
黑龙江省自然科学基金项目(A201406)
船舶预研支撑技术基金项目(13J1.5.1)
关键词
入水
瞬态砰击
双渐进法
非线性
弹性振动
water entry
transient slamming
DAA
nonlinear
elastic vibration
