流速分布及锚链自身刚度对弹性单锚链系统变形和受力的影响  

Analysis of elastic single mooring cable system with different elasticity and velocity distribution

作　　者：郝春玲[1] 张亦飞[1] 滕斌[2] 徐伟[1] 赵海涛[1] 

机构地区：[1]国家海洋局第二海洋研究所,浙江杭州310012 [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116024

出　　处：《海洋学研究》2006年第3期90-95,共6页Journal of Marine Sciences

摘　　要：在锚链系统中,锚链本身的刚度和水流对其作用是影响锚链变形和受力的主要因素。应用分段外推的数值方法,分别对不同刚度和同一弹性锚链在均匀流作用以及同一弹性锚链在不同流速分布(流速在水深方向呈抛物线分布、对数分布)的水流作用下的变形和受力进行了分析和计算,得出了锚链自身的不同刚度及不同流速对锚链的变形及受力的影响情况。结果表明,刚度对锚链受力及变形影响明显,不同流速分布对锚链的偏移量几乎无影响,但对锚链的受力影响较大,选取抛物线型流速分布对锚链安全有利。The elasticity of mooring cable and velocity distribution of the flow are two main factors to affect the behaviors of mooring cable system in marine environment. The piecewise extrapolating method is employed to solve the equation of elastie mooring eable for the different elasticity with the same current velocity distribution and the same elasticity with the different current velocity distribution including uniform current, parabola and logarithm velocity distribution etc. And some corresponding results are obtained by analysis. The results show that the elasticity of the cable has obvious effect on its force and distortion. The change of velocity distribution of the flow has little effect on the excursion of the cable, but affects the force of the cable obviously. Considering the safety of the cable, it＇s better to use logarithm velocity distribution in computation.

关 键 词：锚链 刚度 流速分布 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]