Wash Waves Generated by High Speed Displacement Ships

• Published in: China ocean engineering Vol. 29; no. 5; pp. 757 - 770
• Main Author: 周利兰 高高 R.H.M.Huijsmans
• Format: Journal Article
• Language: English
• Published: Nanjing Chinese Ocean Engineering Society 01.10.2015; Key Laboratory of High Performance Ship Technology Ministry of Education, Wuhan University of Technology, Wuhan 430063, China; School of Transportation, Wuhan University of Technology, Wuhan 430063, China%School of Transportation, Wuhan University of Technology, Wuhan 430063, China%Delft University of Technology, Delft, The Netherlands
• Subjects: Coastal Sciences; Engineering; Fluid- and Aerodynamics; Marine & Freshwater Sciences; Numerical and Computational Physics; NURBS; Oceanography; Offshore Engineering; Simulation; 排水; 方程模型; 波传播模型; 波浪计算; 系泊船舶; 航道水深; 高阶面元法; wave generation model; Boussinesq type equation wave model; wave spectrum method; wash waves; motions of moored ship
• ISSN: 0890-5487; 2191-8945
• DOI: 10.1007/s13344-015-0053-8

It is difficult to compute far-field waves in a relative large area by using one wave generation model when a large calculation domain is needed because of large dimensions of the waterway and long distance of the required computing points. Variation of waterway bathymetry and nonlinearity in the far field cannot be included in a ship fixed process either. A coupled method combining a wave generation model and wave propagation model is then used in this paper to simulate the wash waves generated by the passing ship. A NURBS-based higher order panel method is adopted as the stationary wave generation model; a wave spectrum method and Boussinesq-type equation wave model are used as the wave propagation model for the constant water depth condition and variable water depth condition, respectively. The waves calculated by the NURBS-based higher order panel method in the near field are used as the input for the wave spectrum method and the Boussinesq-type equation wave model to obtain the far-field waves. With this approach it is possible to simulate the ship wash waves including the effects of water depth and waterway bathymetry. Parts of the calculated results are validated experimentally, and the agreement is demonstrated. The effects of ship wash waves on the moored ship are discussed by using a diffraction theory method. The results indicate that the prediction of the ship induced waves by coupling models is feasible.