超大型浮体单模块在浅水斜底系泊下的动态响应

摘要

Waters around the islands is usually very shallow and has a sloped seabed. The hydrodynamic performance of a floating structure in this environment could be very different from its performance in deep water. This paper investigates the dynamic response of a very large floating structure's single module over an uneven seabed in shallow water. The time-do-main motions, and the statistical results of sway and roll motion are respectively obtained by numerical simulations in Or-caFlex and model tests, as well as the line tension statistical results. Results show that the constant wind has little effect on the motion stability and the maximum line tension, while the wave loads have significant influence on the module's motions and the maximum line tension.%岛礁附近的海域通常水深极浅且海底为斜坡,在这类海域中,浮式结构物对环境载荷的动态响应与其在深水中的表现会有较大差别.本文研究超大型浮体的单模块在浅水斜底海域中对风浪载荷的动态响应,分别通过OrcaFlex数值计算和模型试验得到了单模块横荡和横摇运动的时历及统计数据以及锚链张力的统计结果.结果显示定常风对单模块运动的稳定性以及锚链的最大张力影响较小,而波浪载荷对单模块运动及锚链最大张力都有显著的影响.