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Benchmark data and comprehensive uncertainty analysis of two-body interaction model tests in a towing tank

机译:拖船两体相互作用模型试验的基准数据和综合不确定性分析

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摘要

Side-by-side operations are often used in the offshore industry for offloading of oil and gas. Loads on the mooring lines, vessel motions and wave elevations in the gap are among the most critical issues for this type of operations, and they are highly dependent on the hydrodynamic interaction between the vessels. On the other hand, there is limited experimental data available to validate numerical predictions of these hydrodynamic effects. This paper presents extensive experimental benchmark data, and a detailed uncertainty analysis of the results of two-body interaction model tests carried out in the towing tank of Memorial University, Canada. Sources of uncertainty were identified and quantified for 6-DOF motions, wave elevations in the gap between the two models, and drift forces. A combined experimental and numerical method was developed to quantify the uncertainties in model geometry, model mass properties, locations of models, and the set-up of the mooring system. Experimental results with associated uncertainties are compared with potential-flow solutions in the frequency domain. It was found that uncertainties due to the model geometry are negligible, however, those due to the model mass properties may be significant for roll motions. The uncertainty in gap leads to large uncertainties in all the measured results.
机译:并排作业通常在海上工业中用于卸载石油和天然气。对于这种类型的操作,系泊绳上的负载,间隙中的船舶运动和波高是最关键的问题,它们高度依赖于船舶之间的流体动力相互作用。另一方面,有限的实验数据可用于验证这些水动力效应的数值预测。本文介绍了广泛的实验基准数据,以及在加拿大纪念大学的拖船上进行的两体相互作用模型测试结果的详细不确定性分析。确定和量化了6自由度运动,两个模型之间的缝隙中的波高以及漂移力的不确定性来源。开发了一种结合实验和数值方法来量化模型几何形状,模型质量特性,模型位置以及系泊系统设置中的不确定性。将具有不确定性的实验结果与频域中的势流解进行比较。已经发现,由于模型几何形状引起的不确定性可以忽略,但是,由于模型质量特性引起的不确定性对于侧倾运动可能是重要的。间隙的不确定性导致所有测量结果的较大不确定性。

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