Evaluation of the dynamic responses of truss spar platforms for various mooring configurations with damaged lines
Evaluation of the dynamic responses of truss spar platforms for various mooring configurations with damaged lines
复制标题
DOI：
10.1016/j.oceaneng.2016.07.004
复制
发表时间：
2016-09
影响因子：
5
通讯作者：
Montasir Osman Ahmed;A. Yenduri;V. J. Kurian
中科院分区：
文献类型：
--
作者：
Montasir Osman Ahmed;A. Yenduri;V. J. Kurian
安全系泊对于任何平台来说都是至关重要和关注的，因为事故的数量以及由于系泊线行为的不确定性而缺乏知识。这促使研究人员研究系泊线损坏对浮动平台响应的可能影响。因此，本文研究了不同对称和非对称系泊结构下桁梁平台在一条和两条系泊线损坏时的响应。为了研究这种影响，将平台建模为三自由度刚性结构，并对其运动进行了时域分析。采用准静态方法确定了系泊线的力偏移关系。结果表明，损伤系泊线对对称构型和非对称构型的影响基本相同。由于线路的损坏，平台的移动距离相当大。对于对称和非对称配置，两条线路损坏的概率是一条线路损坏的三倍以上。然而，动态运动没有明显的影响。
Safe mooring for any platform is of utmost importance and concern because of the number of accidents as well as lack of knowledge due to uncertainties in the mooring lines behavior. This has led researchers to investigate the possible effect on the responses of a floating platform due to mooring line damages. Hence, this paper addresses the responses of a truss spar platform for various symmetric and asymmetric mooring configurations when one and two lines attached are damaged. To investigate this effect, the platform has been modeled as a three degree-of-freedom rigid structure and its motions are analyzed in time-domain. The force–excursion relationship of mooring lines is determined using quasi-static approach. It is observed that the effect of damaged mooring lines on symmetric and asymmetric configurations is nearly same. The migration distance of platform is considerably significant due to the damaged lines. It is more than thrice when two lines are damaged compared to one damaged line condition for symmetric and asymmetric configurations. However, the dynamic motions are not significantly affected.