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首页> 外文期刊>journal of ocean engineering and marine energy >Development and characterization of a coupled structural dynamics model for the Sandia wave energy converter testbed
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Development and characterization of a coupled structural dynamics model for the Sandia wave energy converter testbed

机译：Development and characterization of a coupled structural dynamics model for the Sandia wave energy converter testbed

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摘要

Validated design tools are one of the key needs for achieving market-competitive levelized cost of energy for wave energy converters (WECs). Sandia National Laboratories recently completed model-scale wave tank tests in the US Navy's Maneuvering and Sea Keeping (MASK) basin with a point absorber-style WEC. In these tests, the WEC was mounted to the MASK Basin bridge for ease of access and to facilitate thorough investigation of WEC dynamics modelling and control design. In collaboration with Sandia, the University of Texas at Dallas developed coupled models of the dynamics of the Sandia WEC and MASK Basin bridge. Initial modelling efforts focused on developing a simple, but accurate model of the MASK Basin bridge that agrees well with measured modes of vibration and measured static displacement under loading. A coupled dynamics model of the Sandia WEC with the validated bridge model was also developed. This coupled model has been examined to determine the degree of coupling between the dynamic responses of the bridge and WEC. Further, the coupled model is useful in the design of future, safe and well-designed experiments. Additionally, the process of including structural models when considering WEC dynamics and control will become increasingly important for larger scale devices. In this paper, first, the creation and calibration of a simple finite element model of the MASK Basin bridge is described. Next, a spring-mass-damper-inspired WEC model is coupled to the bridge model and the resulting coupled model is mathematically verified and validated against experimental data. Finally, the degree of coupling between the WEC and bridge is quantified, a reduced order model is developed, and linearity of the relationship between the wave input and coupled system output is analyzed.

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