The prediction of the dynamic and structural motions of a floating-pier system in waves

• Published in: Ocean engineering Vol. 34; no. 7; pp. 1044 - 1059
• Main Authors: Lee, Hsien Hua, Chen, Liang-Yin, Weng, Wen-Kai, Shyue, S.-W.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 01.05.2007; Elsevier
• Subjects: Applied sciences; Buildings. Public works; Dynamic response; Exact sciences and technology; Floating-pier; Hydraulic constructions; Marine; Offshore structure (platforms, tanks, etc.); Pier with guide-pile; Stresses. Safety; Structural analysis. Stresses; Wave force; Wave structure interaction; Dynamic response; Wave structure interaction; Floating-pier; Pier with guide-pile; Wave force; Wave effect; Equation of motion; Floating structure; Theoretical study; Pontoon; Fluid structure interaction; Forecast model; Flow field; Construction structure
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2006.01.015

In this study, a two-dimensional floating pier consists of single rectangular impermeable pontoon with side supporting pile-columns is studied. The purpose of this study is to present a theoretical solution for the linearized problem of incident waves exerting on a floating pier with pile-restrained. All boundary conditions are linearized in the problem, which is incorporated into a scattering problem and radiation problem with unit displacement. The method of separation of variables is used to solve for velocity potentials. For the radiation problem with unit heave and pitch amplitude, the boundary value problem with non-homogeneous boundary condition beneath the structure is solved by using a solution scheme. By calculating the wave force from velocity potential and solving the equation of motion of the floating structure simultaneously a close form theoretical solution for the problem is developed. The finite element method was also applied to calculate the dynamic responses on the supporting piles subjected to the pontoon motions and incident waves.