On hydrodynamic characteristics of gap resonance between two fixed bodies in close proximity

OCEAN ENGINEERING

卷:173

Article

Gao, Junliang^1,2  Zang, Jun²  Chen, Lifen³  Chen, Qiang²  Ding, Haoyu²  Liu, Yingyi⁴ 

[1] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[2] Univ Bath, Dept Architecture & Civil Engn, Res Unit Water Environm & Infrastruct Resilience, Bath BA2 7AY, Avon, England

[3] Univ Western Australia, Fac Engn & Math Sci, Crawley, WA 6009, Australia

[4] Kyushu Univ, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan

关键词: Gap resonance;    Wave height amplification;    Wave force;    Harmonic analysis;    Response time and damping time of gap resonance;    OpenFOAM (R);   

DOI  :  10.1016/j.oceaneng.2018.12.052

来源: Elsevier

【 摘 要 】

The resonant water motion inside a narrow gap between two identical fixed boxes that are in side-by-side configuration is investigated using a two-dimensional (2D) numerical wave tank based on OpenFOAM (R), an open source CFD package. Gap resonance is excited by regular waves with various wave heights, ranging from linear waves to strong nonlinear waves. This paper mainly focuses on the harmonic analyses of the free-surface elevation in the narrow gap and wave loads (including the horizontal wave forces, the vertical wave forces and the moments) on the bodies. It is found that the influences of the incident wave height on the higher-order harmonic components of different physical quantities are quite different. The effects of the incident wave height on the reflection, transmission and energy loss coefficients are also discussed. Finally, aiming at the quantitative estimation of the response time and the damping time of gap resonance, two different methods are proposed and verified for the first time on gap resonance.

【 授权许可】

Free