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ON THE EFFECTS OF BENDING STIFFNESS FOR FLEXIBLE RISER MODEL TESTS

机译:柔性立管模型测试的弯曲刚度效应

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Oil and gas production systems are continually moving into more challenging environments. Therefore having a precise understanding of the flexible pipeline behaviour for various configurations is becoming even more important. This paper presents a medium scale test of a flexible riser in a wave configuration aiming at representing the bending stiffness characteristic of a flexible riser. Results are then compared tothose of a dynamic analysis software to validate the experimental modeling. This paper addresses the problem of scaling a flexible steep wave riser for model tests, where the global bending response is considered under quasi-static current loading. A methodology for cost-effective and robust model construction is presented, including an effective method of determining the bending stiffness of the model. A 1/15 scale model of a 8" flexible riser was constructed from silicon hose and foam for testing within the Australian Maritime College's Circulating Water Channel (CWC). Variances in the model's buoyant section length, system offset and bending stiffness were tested at different flow velocities to observe the changes in curvature experienced by the riser. The model test regime was formulated specifically to compare the results of CWC testing with numerical modelling results. Comparison between model test and numerical results demonstrate good agreement.
机译:石油和天然气生产系统不断进入更具挑战性的环境。因此,对各种配置的灵活管道行为来说具有精确的理解正在变得更加重要。本文介绍了一种柔性立管的柔性提升管,其波形旨在表示柔性立管的弯曲刚度特性。然后将结果与动态分析软件进行比较以验证实验建模。本文解决了用于模型测试的柔性陡波提升器的缩放问题,其中全局弯曲响应被认为是在准静态电流负载下进行的。提出了一种成本效益和稳健的模型结构的方法,包括确定模型的弯曲刚度的有效方法。 8英寸柔性立管的1/15比例模型由硅软管和泡沫构成,用于在澳大利亚海事学院循环水通道(CWC)内进行测试。模型的浮标长度,系统偏移和弯曲刚度在不同的情况下进行了测试流速来观察提升管经历的曲率变化。模型测试制度专门与数值建模结果进行比较,比较CWC测试的结果。模型试验与数值结果的比较表现出良好的一致性。

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