Modelling the motion of a dropped cylinder under 3D second-order regular waves and identification of the governing parameters

ABSTRACT

Nonlinear regular wave effects on a dropped cylinder are studied and compared with those of linear waves. A 3D second-order wave model is employed to simulate the falling process of a dropped cylinder under nonlinear regular waves. The calculated results for nonlinear regular wave simulations, nonlinear regular wave effects on the trajectory, landing point and falling time of the dropped cylinder into different water depths, waves at zero and nonzero wave heading angles with different frequencies and amplitudes are compared with the corresponding results under linear regular wave simulations. It is found that wave heading, wave frequency, water depth, wave amplitude, and the selection of regular wave model (linear or nonlinear) are factors that may significantly influence the motion of the dropped cylinder.

KEYWORDS:

• 3D second-order wave model
• water depth
• wave frequency
• wave amplitude
• trajectory

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

C. Guedes Soares http://orcid.org/0000-0002-8570-4263

Additional information

Funding

This work was performed within the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering (CENTEC), which is financed by Portuguese Foundation for Science and Technology (Fundação para a Ciência e Tecnologia-FCT), under contract UID/Multi/00134/2013 – LISBOA-01-0145-FEDER-007629.