三维对称楔形体入水的水弹性力学分析

Hydroelasticity analysis of 3D symmetrical wedge water entry

结构入水砰击是一个很复杂的水弹性力学问题,在船舶与海洋工程领域,人们对其十分关注。本文借助模型试验和商用软件平台Ansys技术,对结构入水砰击过程展开研究。首先,自主设计入水结构模型、试验装置,通过布置在楔形体结构内的传感器,全程实时监测楔形体结构下落的压力变化。然后,基于试验结果,数值模拟了三维弹性楔形体的入水砰击过程。得到了砰击压力云图、等效应力云图以及流体的速度云图,对比分析了弹性体测点与试验中测点的砰击压力,验证了该数值模拟方法的可行性与有效性。

Water entry slamming is a complicated hydroelastic problem, which is paid more and more attention in the field of naval architecture and ocean engineering. A systematic study on the process of water entry slamming is performed with the aid of model test and Ansys numerical simulation software technology. Firstly, a reduced scale structure model and test device are designed. The slamming pressure during the structure water entry is measured in real time through the sensors arranged on the wedge structure. The effective and feasibility of the numerical simulation method is validated by model test.Finally, based on the result of the test, numerical simulations of water entry for 3D flexible wedge is conducted. We can obtain both the contours of pressure and von mises stress of the wedge and the contours of velocity of the fluid. The points of flexible wedge and test are compared and analyzed, which proves the feasibility and validity of the numerical simulation method.