海洋工程装备与技术 ›› 2017, Vol. 4 ›› Issue (3): 150-156.

• 海洋工程装备制造材料与设计技术 • 上一篇    下一篇

 波浪对并联双箱作用的耦合水动力共振分析

 姜胜超, 宗智, 邹丽   

  1.  大连理工大学船舶工程学院,辽宁 大连 116024;高新船舶与深海开发装备协同创新中心,上海 200240
  • 收稿日期:2017-04-28 出版日期:2017-06-25 发布日期:2017-08-10
  • 作者简介:姜胜超(1984—),男,博士,副教授,主要从事波浪对海上结构物作用方面的研究。
  • 基金资助:
     中央高校基本科研业务费专项资金[DUT16RC(3)063]

 Wave Resonance between Two Ships with Non-Identical Draft

 JIANG Sheng-chao-, ZONG Zhi, ZOU Li   

  1.  School of Naval Architecture, Dalian University of Technology, Dalian, Liaoning 116024, China; Collaborative Innovation Center for Advanced Ship and Deep Sea Exploration, Shanghai 200240, China
  • Received:2017-04-28 Online:2017-06-25 Published:2017-08-10
  • Supported by:
     

摘要:  基于OpenFOAM研究了波浪作用于并联双箱时的水动力共振问题。主要研究了共振条件下自由水面非线性以及流体黏性对双箱间波高的影响。数值模拟显示,线性势流理论对共振波高的过高估计不仅由于其忽略了流体的黏性,也由于忽略了自由水面非线性的影响。当以共振频率入射时,随着入射波高的增大,更多的能量被反射,导致双箱间相对共振波高以及相对能量耗散的减小。当入射波浪偏移共振频率但仍在共振频率附近时,相对能量耗散成为双箱间相对波高降低的主要因素。总之,在共振条件下,自由水面非线性和流体黏性均有重要的影响。

Abstract:  Wave resonance in the narrow gap between two side-by-side non-identical ships is investigated by employing a two-dimensional numerical wave flume based on OpenFOAM package. The focus of this study is to examine the influence of free surface nonlinearity and fluid viscosity on the hydrodynamic behavior of wave response at around resonant conditions. Numerical simulations show that the unrealistic resonant amplitudes in the narrow gap by linear potential model are not only from the energy dissipation due to vortical motion, but also from the nonlinearity due to free surface. With the increase of incident wave steepness, more relative energy is reflected, leading to the decrease of relative resonant amplitude and relative energy dissipation in the narrow gap at resonant frequency. When the incident wave frequency is outside a little band to resonant frequency, relative energy dissipation becomes the dominant factor for the decrease of relative wave amplitude in the narrow gap with the increase of incident wave amplitudes. In a word, both the free surface nonlinearity and fluid viscosity play the important, but different, roles on wave resonances in the narrow gap.

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