Nonlinear time-domain simulation of two interconnected floating bodies in a numerical wave tank
This study aims at presenting a newly developed nonlinear potential flow model for simulating wave interaction with two interconnected floating bodies in the time domain.A numerical wave tank based on a nonlinear decomposition formulation of the potential flow theory is developed.This piece of work focuses on the accurate calculation of hydrodynamic forces and motions of multiple floating bodies.The hydrodynamic forces are indirectly calculated through an auxiliary function approach, which is extended to application of two floating bodies.To incorporate mathematically a simple interconnection between two floating bodies, we propose a constraint matrix method where the constraints on each body due to the interconnection are represented by a constraint matrix.The constraint forces in the connection are solved in the modified motion equations.The newly formulated model is validated by comparisons with Newman 1 who used a modal expansion method to solve the barge motions.Cases of three types of intercormections, namely, the rigid, the middle-hinge and the end-hinge, are examined to demonstrate the effectiveness of the proposed constraint matrix method.Coupling effects of different connection scenarios on body motions as well as the influence on constraint forces are discussed.Nonlinearities of the body responses are demonstrated.
Fully nonlinear Numerical wave tank Interconnected bodies Constraint matrix Auxiliary function
Xingya Feng Wei Bai
Department of Civil and Environmental Engineering, National University of Singapore Kent Ridge, Singapore 117576
国际会议
The Second Conference of Global Chinese Scholars on Hydrodynamics(第二届全球华人水动学学术会议)
江苏 无锡
英文
289-294
2016-11-11（万方平台首次上网日期，不代表论文的发表时间）