Verification of a hybrid model test method for a deep water floating system with large truncation factor
Verification of a hybrid model test method for a deep water floating system with large truncation factor
复制标题
大截断系数深水浮式系统混合模型试验方法验证
DOI：
10.1016/j.oceaneng.2014.09.047
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发表时间：
2014-12
影响因子：
5
通讯作者：
Sheng Xu
中科院分区：
文献类型：
--
作者：
Chunyan Ji;Sheng Xu
混合模型试验方法被认为是研究深水浮式系统动力学的最可靠方法，当波浪水池不够大，无法在合理的模型比例尺下进行全水深模型试验时。为了得到可靠的实验结果，截断因子应小于5。然而，随着海洋石油和天然气工业向更深的沃茨发展，浮式结构物的模型试验需要在合理的模型比尺下进行改进。本研究的目的是探讨大截尾混合模型试验的深水浮式系统的可行性。本文还对截断系泊缆的混合模型试验技术和动力特性进行了研究。为了在大截断模型试验中实现静力和动力相似，提出了截断系泊系统的优化设计方法，并对大截断模型试验中平台运动响应和系泊缆动力相似性进行了研究。为验证该方法的有效性，基于静力等效原理，将1500 m和1000 m水深的深水半潜式系统截断至200 m水深（截断因子分别为7.5和5），并对在中国船舶科学研究中心波浪水池进行的模型试验进行了动力相似设计。得到了平台的运动响应和系泊缆动力学特性。将试验结果与基于全时域耦合动力分析方法的数值模拟结果进行了比较。数值计算结果与模型实测结果的比较表明，两者吻合较好。
The hybrid model test method has been regarded as the most reliable method to investigate the dynamics of deepwater floating systems when the wave basin is not large enough to conduct the full water depth model tests at reasonable model scales. In order to get the reliable experimental results, the truncation factor should be less than 5. However, as the offshore oil and gas industry moves towards deeper waters, the model tests of floating structures carried out at the wave basin with reasonable model scales need to be revamped. The objective of the present study is to investigate the feasibility of largely truncated hybrid model test for the deep water floating systems. The hybrid model test techniques and the dynamic behaviors of the truncated mooring lines are also studied. In order to achieve the static and dynamic similarities easily in the largely-truncated model tests, an optimization design method of the truncated mooring system is proposed, and the similarities of platform motion responses as well as the mooring lines dynamics are investigated in the largely-truncated model tests. To verify the present method, a deepwater semisubmersible system operated in 1500 m and 1000 m water depth is truncated to 200 m water depth based on the static equivalent principle (the truncation factors are 7.5 and 5 respectively), and the dynamically similar design is implemented to the model tests which are carried out at China Ship Scientific Research Center wave basin. The motion responses of the platform and the mooring line dynamics are obtained. These experimental results are used to compare with the numerical simulation, which is based on the full time domain coupled dynamic analysis method. The comparisons show that the numerical results are in good agreement with the model measurements.
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影响因子：
5
作者：
Kim, MH;Koo, B;Ward, EG
通讯作者：
Ward, EG
DOI：
--
发表时间：
1999
期刊：
--
影响因子：
--
作者：
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通讯作者：
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影响因子：
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作者：
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DOI：
10.4043/12087-ms
发表时间：
2000
期刊：
--
影响因子：
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作者：
C. Stansberg;O. Øritsland;G. Kleiven
通讯作者：
C. Stansberg;O. Øritsland;G. Kleiven
DOI：
--
发表时间：
2000
期刊：
--
影响因子：
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作者：
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Xiaohong Chen;Jun Zhang;Peter Johnson;M. Irani