系缆损伤对绷紧式系泊系统动力响应的影响

发布时间：2018-10-12 18:11

【摘要】：探究合成纤维系缆损伤对绷紧式系泊系统响应的影响,具有重要的工程意义。通过高强聚乙烯(HMPE)缆绳损伤动刚度实验,获得其动刚度随损伤的演变规律。在数值计算上,借鉴并合理简化了前人提出的动刚度经验公式,通过处理实验结果确定动刚度经验公式的参数并进行验证。在此基础上,以一座采用高强聚乙烯缆绳为主体系缆的FPSO为例,将所得动刚度经验公式导入系泊分析软件,结合水动力分析,计算得到在相同海洋环境中,系缆发生不同程度损伤时,各系缆张力和平台偏移响应的结果。通过处理、分析所得的计算结果,获得合成纤维缆绳损伤演变对绷紧式系泊系统响应的影响规律,并据此为系缆更换提供了建议。这些成果既有利于把握绷紧式系泊系统的非线性动力响应,也对安全、经济、合理地运用合成纤维系缆具有重要意义。
[Abstract]:It is of great engineering significance to investigate the effect of cable damage on the response of taut mooring system. The dynamic stiffness of high strength polyethylene (HMPE) cable with damage was obtained by dynamic stiffness experiment. In numerical calculation, the empirical formula of dynamic stiffness proposed by predecessors is simplified and used for reference. The parameters of empirical formula of dynamic stiffness are determined and verified by processing the experimental results. On this basis, taking a FPSO with high-strength polyethylene cable as the main mooring cable, the empirical formula of dynamic stiffness is introduced into the mooring analysis software, and the hydrodynamic analysis is combined to calculate the results in the same marine environment. The results of cable tension and platform offset response when the cable is damaged to different extent. Through the analysis of the calculated results, the influence of the damage evolution of synthetic fiber cable on the response of the taut mooring system is obtained, and some suggestions for the replacement of the mooring cable are provided. These results are not only beneficial to grasp the nonlinear dynamic response of the taut mooring system, but also of great significance to the safe, economical and rational application of the synthetic fiber cable.
【作者单位】：天津大学建筑工程学院;
【基金】：国家自然科学基金(51539008) 天津市应用基础与前沿技术研究计划重点项目(14JCZDJC39900)
【分类号】：U653.2

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