Linear and Nonlinear Hydrodynamic Forces Acting on a Segmented Heaving Wigley Model

Article type: Research Article

Authors: Adegeest, L.J.M.

Affiliations: Laboratory of Ship Hydromechanics, Delft University of Technology, Delft, The Netherlands

Abstract: Linear and nonlinear hydrodynamic reaction forces are investigated by using a ship model, heaving with large amplitudes on a free surface, with forward speed. The ship model used is a mathematically described segmented Wigley model. The hydrodynamic reaction forces are measured and from these the first-, second- and third-order force components are obtained by using Fourier analysis. The first-order components are compared with the theoretical added mass- and damping-distribution. The computations are based on 3-D potential theory. The second-order components are compared with a theoretical approximation based on an extension of the linear potential theory. The calculated first-order forces as well as the second-order forces compare well with the experimental values. The relative importance of the various force components is discussed.

DOI: 10.3233/ISP-1992-3942003

Journal: International Shipbuilding Progress, vol. 39, no. 420, pp. 367-389, 1992