Hydro-elastic modelling of an electro-active wave energy converter
Hydro-elastic modelling of an electro-active wave energy converter
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电活性波浪能转换器的水弹性建模
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. Jean
中科院分区：
文献类型：
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作者：
A. Babarit;Benjamin Gendron;J. Singh;Cecile Melis;P. Jean
自2009年以来，SBM Offshore一直在开发S3波浪能量转换器（S3 WEC）。它由一个由电活性聚合物（EAP）制成的长柔性管组成。因此，结构材料也是动力起飞（PTO）。为了优化S3 WEC，建立了一个能够预测设备动态响应的水弹性数值模型。模型考虑了内部流动、弹性壁面变形和外部流动，假设如下：内部流动采用欧拉方程。流动也假定是均匀的。壁管的弹性变形是线性化的。采用线性势理论对外流进行建模。为了建立数值模型，这些方程被合并在一起。首先，在没有外部流体的情况下对它们进行求解，以获得装置的响应模态。其次，考虑外流体的存在，利用模态展开法求解运动方程。同时，在南特中央学院的海洋盆地进行了实验验证试验。比例模型是由EAP制成的10米长的管子。利用电活性聚合物测量了管的变形。该模型还配备了传感器，以测量内部压力。在对壁面阻尼进行标定的情况下，数值模型与实验结果吻合较好。最后，给出了该装置尺寸的技术经济参数研究结果。ASME版权所有©2013
Since 2009, SBM Offshore has been developing the S3 Wave Energy Converter (S3 WEC). It consists in a long flexible tube made of an Electro-Active Polymer (EAP). Thus, the structural material is also the Power Take Off (PTO).In order to optimize the S3 WEC, a hydro-elastic numerical model able to predict the device dynamic response has been developed. The inner flow, elastic wall deformations and outer flow are taken into account in the model under the following assumptions: Euler equation is used for the inner flow. The flow is also assumed to be uniform. Elastic deformation of the wall tube is linearized. The outer flow is modeled using linear potential theory. These equations have been combined in order to build the numerical model. First, they are solved in the absence of the outer fluid in order to obtain the modes of response of the device. Secondly, the outer fluid is taken into account and the equation of motion is solved by making use of modal expansion.Meanwhile, experimental validation tests were conducted in the ocean basin at Ecole Centrale De Nantes. The scale model is 10m long tube made of EAP. The tube deformations were measured using the electro-active polymer. The model was also equipped with sensors in order to measure the inner pressure. Comparisons of the deformation rate between the numerical model and experimental results show good agreement, provided that the wall damping is calibrated.Eventually, results of a technico-economical parametric study of the dimensions of the device are presented.Copyright © 2013 by ASME