A Fully Nonlinear, Dynamically Consistent Numerical Model for Ship Maneuvering in a Seaway. (26th July 2011)

• Record Type: Journal Article
• Authors: Lin, Ray-Qing; Kuang, Weijia
• Other Names: Bruzzone Agostino Academic Editor.
• Is Part Of: Modelling and simulation in engineering. Volume 2011(2011)
• Publication Date: 2011-07-26
• Subjects: Engineering -- Simulation methods -- Periodicals; Engineering -- Mathematical models -- Periodicals; 620.004
• DOI: 10.1155/2011/356741
• Languages: English
• ISSNs: 1687-5591

Abstract

Abstract : This is the continuation of our research on development of a fully nonlinear, dynamically consistent, numerical ship motion model (DiSSEL). In this paper we report our results on modeling ship maneuvering in arbitrary seaway that is one of the most challenging and important problems in seakeeping. In our modeling, we developed an adaptive algorithm to maintain dynamical balances numerically as the encounter frequencies (the wave frequencies as measured on the ship) varying with the ship maneuvering state. The key of this new algorithm is to evaluate the encounter frequency variation differently in the physical domain and in the frequency domain, thus effectively eliminating possible numerical dynamical imbalances. We have tested this algorithm with several well-documented maneuvering experiments, and our results agree very well with experimental data. In particular, the numerical time series of roll and pitch motions and the numerical ship tracks (i.e., surge, sway, and yaw) are nearly identical to those of experiments.