On the calibration of a WEC-Sim model for heaving point absorbers

作者：Tom Tosdevin, Marianna Giassi, S. Thomas, Jens Engström, Martyn Hann, Jan Isberg, Malin Göteman, Edward Ransley, P Musliedlak, David Simmonds, Deborah Greaves · 发表于：PEARL (University of Plymouth) · 年份：2019 · 被引用次数：10 · 研究领域：Adhesion, Friction, and Surface Interactions、Engineering Applied Research、Magnetic Bearings and Levitation Dynamics

The outcomes of reliability based design\nmethods applied to wave energy converters (WECs) in the\nearly stages of development depend heavily on the\nuncertainty in the variables used to determine the loads\nacting on, and responses of, devices. Open source software\nhas been developed in recent years to aid in the response\nmodelling of devices such as NEMOH, WEC-Sim and\nOpenFOAM. Uncertainty in the estimation of the viscous\ndrag forces acting on a device has been identified as a key\nsource of error in diffraction and radiation based\nhydrodynamic models. Different methods of determining\nthe drag coefficient are compared in the case of 2 heaving\npoint absorbers in the absence of PTOs.\nThis study uses physical model decay tests to try and\nquantify the viscous damping for the X-MED buoy and\nUppsala University’s model WEC, a bottom referenced\npoint absorber similar to the full scale Seabased device. The\napproach is then evaluated by applying the values obtained\nfor the drag coefficients to the hydrodynamic model WECSim which is then compared to physical model tank tests in\nregular waves.