CAJ | 학술논문

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。
의거쌍점진법건립연구탄성결구입수팽격과정중탄성효응적수치방법。재탄성결구입수순태팽격과정중，자유액면속도세만족자유액면적비선성조건，병통과고필결구운동비선성적백노리방정장류체역공제방정여결구탄성동력향응방정우합구해，계산결과여시험결과진행료비교분석。결과분석표명，류고우합효응대탄성결구입수팽격재하급결구탄성동력향응영향불가홀략。원주체경사입수과정중수평、수향합력재두부입수화미부입수시각출현량개봉치；입수각도대선박입수팽격안전성지관중요。
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.