Numerical investigation of influence of wave directionality on the water resonance at a narrow gap b

• 作 者: JIN Ruijia TENG Bin NING Dezhi ZHAO Ming CHENG Liang
• 机 构: State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,State Key
• 出 处: Acta Oceanologica Sinica
• 发表日期: 2017年06期
• 关键词: side-by-side barges resonant elevation second-order time-domain model wave direc

A three-dimensional time-domain potential flow model with second-order nonlinearity was applied to simulate the wave resonance in a gap between two side-by-side rectangular barges. In the model, the velocity potential was decomposed into the incident potential and unknown scattered potential which was obtained by solving the boundary integral equation. The fourth-order predict-correct method was applied to enforce the free surface conditions in the time integration. The influence of the wave direction on the first and second-order gap surface elevations was investigated. The results reveal that the incident wave angle does not affect the resonant wave frequency and the maximum surface elevation at resonance always occurs at the middle location along the gap.However, the corresponding maximum wave surface elevation at resonance varies with the incident wave angle.The location of the maximum wave elevation shifts either upstream or downstream along the gap, depending on the relative magnitude of incident wave frequency to the resonant frequency.

A three-dimensional time-domain potential flow model with second-order nonlinearity was applied to simulate the wave resonance in a gap between two side-by-side rectangular barges. In the model, the velocity potential was decomposed into the incident potential and unknown scattered potential which was obtained by solving the boundary integral equation. The fourth-order predict-correct method was applied to enforce the free surface conditions in the time integration. The influence of the wave direction on the first and second-order gap surface elevations was investigated. The results reveal that the incident wave angle does not affect the resonant wave frequency and the maximum surface elevation at resonance always occurs at the middle location along the gap. However, the corresponding maximum wave surface elevation at resonance varies with the incident wave angle The location of the maximum wave elevation shifts either upstream or downstream along the gap, depending on the relative magn itude of incident wave frequency to the resonant frequency.