Motion responses of a moored barge in shallow water. (15th March 2015)

• Record Type: Journal Article
• Authors: Xiong, Lingzhi; Lu, Haining; Yang, Jianmin; Zhao, Wenhua
• Is Part Of: Ocean engineering. Volume 97(2015)
• Page Start: 207
• Page End: 217
• Publication Date: 2015-03-15
• Subjects: Shallow water effects -- QTF -- Numerical simulations -- Physical model tests -- Moored barge; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2015.01.018
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Motion characteristics of a floating structure in shallow water are of great concern in ocean engineering. Shallow water effects will significantly affect the hydrodynamic performance of a floating structure. In this study, both numerical and experimental studies have been conducted to investigate the hydrodynamic performance of a barge in shallow water. Numerical simulations are conducted in both frequency and time domains based on 3D potential theory. Second-order wave forces have been incorporated in the numerical model through the calculation of fully quadratic transfer function. The numerical results are validated through a series of physical model tests, including free decay test and irregular wave tests. Responses of the floating structure in different water depths and sea states are studied to clarify the safe conditions for a float-over installation in shallow water. Based on the numerical and experimental results, some conclusions have been drawn. Furthermore, a critical depth for shallow water effects is clarified. Highlights: Numerical simulations are conducted to obtain barge motions. Second-order wave excitation forces are calculated by full QTF. Model tests are conducted to validate the numerical model. Sensitivity study is investigated focusing on the shallow water effects. A critical depth for shallow water effects is clarified.