内部摆式波能转换装置水动力性能的数值研究

发布时间：2018-01-07 00:40

本文关键词：内部摆式波能转换装置水动力性能的数值研究　出处：《大连理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：海洋中的波浪能利用技术在最近五十多年以来取得了长足的进步,各个国家和地区对其进行了大量研究,先后提出多种形式的波能转换装置的构想,有些做成试验装备问世,其中一部分已经投入商业化生产。本文所研究的内部摆式波能转换装置是一种利用波浪作用下内部摆和外部浮体相对运动,推动液压泵,驱动发电机产生电能。这种新形式的波能转换装置的主要优点是：适应环境多样、造价相对较低、耐久性高。在国外还处于理论研究阶段,亟待进一步的探讨。本文首先分析了内部摆式波能转换装置的受力分析和运动分析,基于势流理论分析了波浪对装置的作用,分别建立了波能转换装置的频域运动方程和时域运动方程用以求出运动响应,并以此为基础求出传动力、传动力矩、输出功率、波能俘获效率。主要从以下几个方面展开工作： (1)首先重点考虑内部液压系统阻尼、内部液压系统刚度、外部浮体水平刚度三个参数的配合,大致确定了这三个参数的取值。 (2)对结构的浮体质量与内部摆质量的比值、内部摆的大球质量和小球质量之比、内部摆和外部浮体的连接点与外部浮体的质心的距离、大球质心与内部摆和外部浮体的连接点的距离等参数进行改变,通过频域模型给出合理的模型设计参数。 (3)考虑了的非线性质量阵和非线性附加力的影响,通过时域计算,更加准确的估算了结构的水动力特性和输出功率。
[Abstract]:The technology of wave energy utilization in the ocean has made great progress in the last 50 years. Various countries and regions have carried out a lot of research on it, and put forward the concept of various forms of wave energy conversion device. Some have been made into experimental equipment, some of which have been put into commercial production. The internal pendulum wave energy conversion device studied in this paper is a kind of relative motion between the internal pendulum and the external floating body under the action of the wave to promote the hydraulic pump. The main advantages of this new type of wave energy conversion device are that it adapts to various environments, relatively low cost and high durability, and is still in the stage of theoretical research abroad. There is an urgent need for further discussion. In this paper, the force analysis and motion analysis of the internal pendulum wave energy conversion device are first analyzed, and the effect of the wave on the device is analyzed based on the potential flow theory. The frequency domain motion equation and the time domain motion equation of the wave energy conversion device are established to obtain the motion response, and on this basis, the transmission force, transmission torque and output power are obtained. Wave energy capture efficiency. The work is mainly carried out in the following aspects: Firstly, three parameters of internal hydraulic system damping, internal hydraulic system stiffness and external horizontal stiffness of floating body are considered, and the values of these three parameters are roughly determined. (2) the ratio of the mass of the floating body to the mass of the internal pendulum, the ratio of the mass of the inner pendulum to the mass of the small ball, the distance between the connecting point between the internal pendulum and the external floating body and the center of mass of the outer floating body. The parameters such as the distance between the center of mass of the ball and the connection point between the inner pendulum and the external floating body are changed and the reasonable design parameters of the model are given through the frequency-domain model. Considering the influence of nonlinear mass matrix and nonlinear additional force, the hydrodynamic characteristics and output power of the structure are estimated more accurately by time domain calculation.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P743.2

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