Experimental Study and Numerical Analysis of Floating Crane Catamaran Mooring Tension in Intact and Damage Conditions Using Time-Domain Approach

Mochamad Hanif Rafi’i, E. Djatmiko, Murdjito, Erdina Arianti
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Abstract

Floating Crane Catamaran equipped with a mooring system to keep stable while operating. During operation, wave load causes tension on the mooring system. In this study, the tension of the mooring system was analyzed using experimental studies and numerical analysis with intact and damaged mooring conditions. Experimental studies were carried out by simulating a physical model in the Ocean Basin Maneuvering Laboratory, BTH-BPPT. While numerical using related software. Mooring tension analysis is carried out using the frequency domain approach which refers to the API RP 2SK rules. The sum of the average tension, significant low frequency tension and maximum wave frequency tension is the maximum tension of the mooring system. The low frequency tension and wave frequency tension is obtained by the low-band-pass filter process. The stochastic value is obtained by the FFT of low frequency and wave frequency tension. The results of maximum tension from experimental and numerical at intact conditions, wave headings 90°, Hs  2.5 m, are 373.7 kN and 441.6 kN and at Hs  6.37 m are 565.6 kN and 1741.5 kN. In the damaged condition, wave heading 90°, Hs 2.5 m, the maximum tension is 863.9 kN and 2113.3 kN.
基于时域方法的浮式起重机双体船系泊张力试验研究与数值分析
浮式起重机双体船配有系泊系统,在运行时保持稳定。在运行过程中,波浪荷载对系泊系统产生张力。在本研究中,采用实验研究和数值分析的方法对系泊系统的张力进行了完整和损坏系泊条件下的分析。实验研究是在BTH-BPPT海洋盆地机动实验室模拟物理模型进行的。同时使用相关软件进行数值计算。采用参考API RP 2SK规则的频域方法进行系泊张力分析。平均张力、显著低频张力和最大波频张力之和为系泊系统的最大张力。低频张力和波频张力通过低带通滤波处理得到。通过低频和波频张力的FFT得到随机值。实验和数值结果表明,在完整条件下,波浪向90°,高2.5 m时,最大张力为373.7 kN和441.6 kN,在高6.37 m时,最大张力为565.6 kN和1741.5 kN。在破坏工况下,波浪向90°,高2.5 m,最大张力分别为863.9 kN和2113.3 kN。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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