A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies

Applied Sciences

Zhiqun Guo¹  Shuangrui Yu¹  Qingwei Ma¹  Hongde Qin¹ 

[1] College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;

关键词: Green’s function;    viscous dissipation effects;    roll damping;    bilge keel;    large amplitude;   

DOI  :  10.3390/app8040517

来源: DOAJ

【 摘 要 】

A novel time-domain body-nonlinear Green’s function method is developed for evaluating large-amplitude roll damping of two-dimensional floating bodies with consideration of viscous dissipation effects. In the method, the instantaneous wetted surface of floating bodies is accurately considered, and the viscous dissipation effects are taken into account based on the “fairly perfect fluid” model. As compared to the method based on the existing inviscid body-nonlinear Green’s function, the newly proposed method can give a more accurate damping coefficient of floating bodies rolling on the free surface with large amplitudes according to the numerical tests and comparison with experimental data for a few cases related to ship hull sections with bilge keels.

【 授权许可】

Unknown