集中质量法计算深海系泊冲击张力  

Analysis of Snap Tension of Deep Water Mooring with Lumped Mass Method

作　　者：唐友刚[1] 张若瑜[1] 程楠[1] 赵晶瑞[1] 

机构地区：[1]天津大学建筑工程学院港口与海洋工程教育部重点实验室,天津300072

出　　处：《天津大学学报》2009年第8期695-701,共7页Journal of Tianjin University(Science and Technology)

基　　金：国家"863"高技术研究发展计划资助项目(2007AA09Z304);国家自然科学基金资助项目(50679051);国家自然科学基金重点资助项目(50639030)

摘　　要：采用三维集中质量法建立深海系缆模型,计算系缆的构型及张力.根据各点的初始条件和系缆两端点处的位移边界条件,求解系缆的三维运动方程;分析系缆在不同激励频率和激励幅值下的运动响应,并预测系缆松弛-张紧运动的发生条件和系缆冲击载荷的大小.研究表明,系缆张力随系缆的上端点的运动而变化.当系缆上端点的激励频率和幅值达到一定值时,系缆会出现交替松弛-张紧的现象,产生冲击载荷.The three dimensional lumped mass model was used to analyze cable configuration and tension. The equations of the three dimensional motion of a marine cable are solved considering the initial condition of all nodes and the boundary conditions of both ends of the cable. The dynamic response of the cable was analyzed in different excitation amplitude and frequency. The occurrence condition of the taught-slag state was predicted and the snap tension of the cable was calculated. The research shows that the cable tension changes with the motion of the upper point of the cable. When the excitation becomes severe ,the cable starts to operate in alternating taut-slack conditions and causes the snap tension.

关 键 词：深海系泊 系缆张力 冲击载荷 动力响应 冲击放大系数 

分 类 号：P795[天文地球—海洋科学]