波浪周期性作用对海床基回收的影响研究  

Research on the Wave Period Effects on Seabed Platform Recovery

作　　者：胡展铭[1] 陈伟斌[1] 张卫平[2] 胡波[1] 

机构地区：[1]国家海洋环境监测中心,辽宁大连116023 [2]大连理工大学海岸及近海工程国家重点实验室,辽宁大连116023

出　　处：《海洋技术》2014年第3期27-32,共6页Ocean Technology

基　　金：国家海洋局海洋公益性项目资助(200905007)

摘　　要：针对海床基回收过程中波浪对回收绳索的冲击响应问题,通过对回收船—回收绳体系的运动响应进行数值模拟仿真,模拟回收绳索的松弛—张紧动态响应过程,分析波浪周期性作用对回收绳索冲击张力的影响。研究结果表明,冲击张力与波高成线性关系且不同周期条件下冲击张力随波高增加量差异较大,冲击张力对波浪周期的响应极为敏感,长周期波浪冲击响应较小,而短周期波浪冲击响应较大,易超出回收绳索的极限负荷,特别是当波长达到船长两倍左右时冲击张力达到最大;随着水深增加,冲击张力呈指数衰减,因此在浅水区波浪周期性作用对海床基的回收影响更大。Aimed at the problem of wave-recovery rope impact response in the process of seabed platform recovery,the dynamic slack-taut response of seabed platform recovery rope is studied through numerical simulation of re covery ship-rope system under wave action, so as to analyze the wave period effects on the recovery rope ＇s snap tension. The results indicate that the snap tension and wave height show a good linear relationship, and the increment of snap tension with increasing wave height varies remarkably under different wave periods. The snap tension response is very sensitive to wave period. The response is relatively small under long-period waves while the snap tension increases notably and can exceed the limit strength of recovery rope under short-period wave action. Especially, the snap tension reaches its maximum when the wavelength is about twice the ship length.With increasing water depth, the snap tension decays exponentially, and the safety of seabed platform recovery will be improved. Therefore, the wave period effects on seabed platform recovery are greater in shallow waters.The research conclusions of this paper can provide a reference and guideline for the safe recovery of seabed platform.

关 键 词：海床基 波浪 冲击张力 

分 类 号：X834[环境科学与工程—环境工程]