点吸收波浪能转换装置的非线性动力学分析

发布时间：2018-05-29 06:50

本文选题：点吸收波浪能转换装置 + 能量输出系统(PTO)　；参考：《中国海洋大学学报(自然科学版)》2016年07期

【摘要】：点吸收式波浪能转换系统是最有效的波浪能利用装置之一,为提高能量利用性能该装置中的能量输出系统(Power Take-Off,简称为PTO)常设计有非线性环节。本文考虑了PTO中的非线性阻尼和非线性刚度等因素,对点吸收式波浪能转换装置的动力学进行了研究。根据流体动力学软件获取了浮体在波浪作用下的水动力参数,建立了PTO中包含中非线性阻尼和非线性刚度的动力学方程,采用Runge-Kutta法对其时域响应进行了求解,并分析了波幅和不同非线性刚度系数对能量俘获宽度的影响,研究表明选择合理的立方刚度非线性系数可以增加能量俘获宽度,提高能量利用率。
[Abstract]:The point absorption wave energy conversion system is one of the most effective wave energy utilization devices. In order to improve the energy utilization performance, the energy output system of the device, Power Take-Off-Out (PTO), is often designed with nonlinear links. In this paper, the nonlinear damping and nonlinear stiffness in PTO are considered, and the dynamics of point absorption wave energy conversion device is studied. The hydrodynamic parameters of the floating body under the action of waves are obtained by using the hydrodynamic software. The dynamic equations including the medium nonlinear damping and the nonlinear stiffness in the PTO are established, and the time-domain response of the floating body is solved by using the Runge-Kutta method. The effects of amplitude and different nonlinear stiffness coefficients on the energy capture width are analyzed. The results show that the reasonable cubic stiffness nonlinear coefficient can increase the energy capture width and improve the energy utilization ratio.
【作者单位】：中国海洋大学工程学院;海洋工程山东省重点实验室;
【基金】：国家自然科学基金项目(051175484) 新世纪人才计划项目(NCET-12-0500) 青岛市基础研究计划项目(12-1-4-1-(17)-jch)资助~~
【分类号】：P743.2

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