Moored offshore structures - evaluation of forces in elastic mooring lines
Moored offshore structures - evaluation of forces in elastic mooring lines
复制标题
系泊海上结构 - 弹性系泊线中的力评估
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
O. Marcu
中科院分区：
文献类型：
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作者：
L. Crudu;D. Obreja;O. Marcu
在大多数情况下，浮式结构物的高频运动会对系泊缆产生重要影响，系泊缆也会影响浮式结构物的运动。在对不同系泊浮式结构物进行系统的实验测试和计算过程中积累的经验表明，各种参数对动态效应的影响是复杂的。因此，认为有必要进行系统的调查。由于海洋结构物行为的流体动力学方面的复杂性，为了能够正确评估并验证其在真实的海洋中的行为，实验测试实际上是强制性的。此外，客户、船级社和其他监管机构经常要求进行流体动力学试验。因此，正确模拟复杂比例模型的物理特性成为一个非常重要的问题。本文正在研究这类问题，确定可能的简化，产生不同的方法。评价的基础之一是对系泊链在五个不同尺度下的动态行为进行系统实验测试的结果。动态效果以及弹性模拟的影响，为5个不同的尺度一起评估。本文介绍了一个典型的系泊浮式结构作为管层的运动评估和加速度在波浪中的基础上的系统图和实际结果。
In most situations, the high frequency motions of the floating structure induce important effects in the mooring lines which affect also the motions of the structure. The experience accumulated during systematic experimental tests and calculations, carried out for different moored floating structures, showed a complex influence of various parameters on the dynamic effects. Therefore, it was considered that a systematic investigation is necessary. Due to the complexity of hydrodynamics aspects of offshore structures behaviour, experimental tests are practically compulsory in order to be able to properly evaluate and then to validate their behaviour in real sea. Moreover the necessity to carry out hydrodynamic tests is often required by customers, classification societies and other regulatory bodies. Consequently, the correct simulation of physical properties of the complex scaled models becomes a very important issue. The paper is investigating such kind of problems identifying the possible simplification, generating different approaches. One of the bases of the evaluation has been found consideringtheresults of systematic experimental tests on the dynamic behaviour of a mooring chain reproduced at five different scales. Dynamic effects as well as the influences of the elasticity simulation for 5 different scales are evaluated together. The paper presents systematic diagrams and practical results for a typical moored floating structure operating as pipe layer based on motion evaluations and accelerations in waves.