Topographic influences on transient harbor oscillations excited by N-waves

OCEAN ENGINEERING

卷:192

Article

Gao, Junliang^1,2,3  Ma, Xiaozhou²  Dong, Guohai²  Zang, Jun³  Zhou, Xiaojun¹  Zhou, Li¹ 

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

[2] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

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

关键词: Harbor oscillations;    Harbor resonance;    N-waves;    Topographic variation;    Numerical simulation;    FUNWAVE-TVD;   

DOI  :  10.1016/j.oceaneng.2019.106548

来源: Elsevier

【 摘 要 】

The main objective of this paper is to comprehensively study influences of the variation of the bottom profile inside the harbor on the transient harbor oscillations excited by normally-incident N-waves. The specific physical phenomena investigated consist of wave profile evolution, maximum runup, relative wave energy distribution and total wave energy inside the harbor. A series of numerical experiments are implemented using a fully nonlinear Boussinesq model, FUNWAVE-TVD. Results show that when the harbor is subjected to the leading-elevation N-waves (LEN waves), the evolution of the maximum free surface elevation during the wave shoaling process inside the harbor coincides well with Green's law overall. When the incident wave amplitude is small, the maximum runup inside the harbor is almost only determined by the incident wave amplitude. As the incident wave amplitude increases, effects of the bottom profile on the maximum runup closely depend on both the incident wave type and amplitude. As the mean water depth inside the harbor decreases, the relative wave energy distribution tends to become more uniform, regardless of the incident wave amplitude and type. Finally, the variation trend of the total wave energy with the bottom profile is found to depend on the incident wave amplitude.

【 授权许可】

Free