弹性结构入水砰击载荷特性三维数值模拟研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (19) : 28-34.

论文

弹性结构入水砰击载荷特性三维数值模拟研究

杨衡，孙龙泉，龚小超，姚熊亮

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The 3D Numerical Simulation of Slamming Load Character on Water Entry of elastic structure

Yang heng Sun long-quan Gong xiao-chao Yao xiong-liang

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文章历史 +

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。

Abstract

Based on doubly asymptotic approximation method ,a numerical method which aims to study the effect of elastic structure during slamming is developed. During transient slamming of the elastic structure with the water, the velocity potential of free surface satisfies the nonlinear condition of free water surface,considering nonlinear Bernoulli equation of structure movement ,the research couples the control equations in fluid field with dynamic response equations of the elastic structure,and computed result is compared with the test result. Analysis of the results show:fluid-solid coupling effect has certain influence on slamming load and elastic dynamic response of the structure during water entry.The horizontal and vertical force of cylinder have two peaks while tilt water entry.The angle of water entry is critical important to ship.

导出引用

杨衡;孙龙泉;龚小超;姚熊亮. 弹性结构入水砰击载荷特性三维数值模拟研究[J]. 振动与冲击, 2014, 33(19): 28-34

Yang heng Sun long-quan Gong xiao-chao Yao xiong-liang. The 3D Numerical Simulation of Slamming Load Character on Water Entry of elastic structure[J]. Journal of Vibration and Shock, 2014, 33(19): 28-34