Investigation on Ship Hydroelastic Vibrational Responses in Waves

Applied Sciences

Jialong Jiao¹  Haicheng Yu²  Yi Xia³  Huilong Ren⁴ 

[1] Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA;College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;;Department of Civil, Environmental &School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;

关键词: ship hydroelasticity theory;    wave loads;    slamming loads;    segmented model test;    irregular waves;   

DOI  :  10.3390/app8112327

来源: DOAJ

【 摘 要 】

The hydroelastic vibrational responses of a large ship sailing in regular and irregular head waves are investigated numerically and experimentally. A 3D time-domain nonlinear hydroelastic mathematical model is established in which the hydrostatic restoring forces and incident wave forces are calculated on the instantaneous wetted hull surface to consider nonlinear effects of the rigid motion and elastic deformation of the hull in harsh waves. Radiation and diffraction wave forces are computed on the mean wetted surface based on the 3D frequency-domain potential flow theory. The slamming loads are calculated by momentum theory and integrated into the hydrodynamic forces. The 1D Timoshenko beam theory is adopted to model the vibrational structural response and is fully coupled with the presented hydrodynamic theory in time-domain to generate the hydroelastic equation of motion. Moreover, self-propelled segmented model tests were conducted in a laboratory wave tank to experimentally investigate the hydroelastic responses of a target ship in regular and irregular head seas. The numerical and experimental results are systemically compared and analyzed, and the established hydroelastic analysis model turns out to be reliable and effective in the prediction of ship hydroelastic responses in waves.

【 授权许可】

Unknown