变几何元件控制及功率输出对波浪能变换器结构载荷的影响

IF 1.3 4区 工程技术 Q3 ENGINEERING, MECHANICAL Journal of Offshore Mechanics and Arctic Engineering-Transactions of the Asme Pub Date : 2023-04-05 DOI:10.1115/1.4062115
Salman Husain, Jacob Davis, Nathan Tom, Krish Thiagarajan Sharman, Cole Burge, Nhu Nguyen
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引用次数: 0

摘要

海洋环境恶劣,可以对部署的结构施加巨大的载荷。波能转换器(WEC)的设计应能最大限度地吸收能量,同时确保工作波条件不超过设备本身的失效限制。因此,支撑结构所承受的载荷是系统的设计约束。此外,WEC应适应不同的海况。本研究使用WEC-Sim模型模拟了安装在支撑结构上的可变几何振荡波能转换器(VGOSWEC)在不同波况下的模拟。VGOSWEC类似于一个桨,围绕垂直于入射波前的固定铰链摆动。当结构承受阈值载荷时,通过在俯仰桨上打开一系列可控襟翼来改变VGOSWEC的几何形状。假设打开襟翼应该通过减少铰链轴的力矩而导致支撑结构底部的负载脱落。这项工作比较了完全关闭和完全打开的可控襟翼结构的水动力系数、自然周期和响应幅度算子。这项工作表明,完全开放的配置可以减少高达80%的俯仰和浪涌负载的基础上的支持结构。在结构自然周期增加的载荷可以通过轴向功率输出阻尼来减轻,轴向功率输出阻尼作为一个额外的设计参数来控制WEC支撑结构的载荷。
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Influence on Structural Loading of a Wave Energy Converter by Controlling Variable-Geometry Components and the Power Take-Off
Abstract Oceans are harsh environments and can impose significant loads on deployed structures. A wave energy converter (WEC) should be designed to maximize the energy absorbed while ensuring the operating wave condition does not exceed the failure limits of the device itself. Therefore, the loads endured by the support structure are a design constraint for the system. Furthermore, the WEC should be adaptable to different sea states. This work uses a WEC-Sim model of a variable-geometry oscillating wave energy converter (VGOSWEC) mounted on a support structure simulated under different wave scenarios. A VGOSWEC resembles a paddle pitching about a fixed hinge perpendicular to the incoming wave fronts. The geometry of the VGOSWEC is varied by opening a series of controllable flaps on the pitching paddle when the structure experiences threshold loads. It is hypothesized that opening the flaps should result in load shedding at the base of the support structure by reducing the moments about the hinge axis. This work compares the hydrodynamic coefficients, natural periods, and response amplitude operators from completely closed to completely open configurations of the controllable flaps. This work shows that the completely open configuration can reduce the pitch and surge loads on the base of the support structure by as much as 80%. Increased loads at the structure’s natural period can be mitigated by an axial power take-off damping acting as an additional design parameter to control the loads at the WEC’s support structure.
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来源期刊
CiteScore
4.20
自引率
6.20%
发文量
63
审稿时长
6-12 weeks
期刊介绍: The Journal of Offshore Mechanics and Arctic Engineering is an international resource for original peer-reviewed research that advances the state of knowledge on all aspects of analysis, design, and technology development in ocean, offshore, arctic, and related fields. Its main goals are to provide a forum for timely and in-depth exchanges of scientific and technical information among researchers and engineers. It emphasizes fundamental research and development studies as well as review articles that offer either retrospective perspectives on well-established topics or exposures to innovative or novel developments. Case histories are not encouraged. The journal also documents significant developments in related fields and major accomplishments of renowned scientists by programming themed issues to record such events. Scope: Offshore Mechanics, Drilling Technology, Fixed and Floating Production Systems; Ocean Engineering, Hydrodynamics, and Ship Motions; Ocean Climate Statistics, Storms, Extremes, and Hurricanes; Structural Mechanics; Safety, Reliability, Risk Assessment, and Uncertainty Quantification; Riser Mechanics, Cable and Mooring Dynamics, Pipeline and Subsea Technology; Materials Engineering, Fatigue, Fracture, Welding Technology, Non-destructive Testing, Inspection Technologies, Corrosion Protection and Control; Fluid-structure Interaction, Computational Fluid Dynamics, Flow and Vortex-Induced Vibrations; Marine and Offshore Geotechnics, Soil Mechanics, Soil-pipeline Interaction; Ocean Renewable Energy; Ocean Space Utilization and Aquaculture Engineering; Petroleum Technology; Polar and Arctic Science and Technology, Ice Mechanics, Arctic Drilling and Exploration, Arctic Structures, Ice-structure and Ship Interaction, Permafrost Engineering, Arctic and Thermal Design.
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