兼具波浪能提取功能的浮式防波堤性能研究

发布时间：2018-06-12 16:23

本文选题：波浪能提取装置 + 浮式防波堤　；参考：《大连理工大学》2015年硕士论文

【摘要】：随着全球能源消费的迅速增长,能源安全和能源环境问题越来越受到关注。各国科学家都在努力研究,开发和利用新能源。海洋能以其独特的魅力吸引了无数研究者的目光。海洋能不仅储量大,而且种类繁多。其中海洋波浪能无处不在,而且受时间限制相对较小,同时波浪能的能流密度较大,可以通过较小的装置俘获较大的能量。因此,各国科学家提出了很多种不同的波浪能吸收装置,却未商业化,这是急需解决的问题。传统的振荡浮子式波浪能装置需要专门在海上为该装置建立支撑或者底座系统,这大大增加了投资的成本,限制了波浪能装置的规模化和商业化。一种方式是通过建立多功能海上结构物,利用已有的海上浮体或者其他海上结构充当波浪能转换装置的支撑系统,如海上浮式防波堤。当一个波列通过波浪能装置时,由于一部分波浪能量被波浪能装置提取,从而使通过装置后的波高下降。因此波浪能装置的作用与防波堤有一些类似,防波堤简单的把波浪反射回海里,而波能装置则提取一部分波浪能量并把它转化成电能。因此,将浮式防波堤和波浪能转换装的功能结合是一个切实可行的选择。基于此,本文提出一种具有波浪能转换功能的浮式防波堤结构,并对该结构的水动力特性进行研究。本文利用有限元方法和VOF技术建立了二维粘性数值波浪水槽,对兼具波浪能转换功能的圆柱形浮式防波堤进行研究。主要研究浮式防波堤在波浪作用下的运动响应,探究浮体断面尺寸、阻尼系数等参数对单个圆柱形浮式防波堤的消浪性能和波浪能提取效率的影响。考虑到单个圆柱形浮式防波堤的消浪作用有限,本文建立了双圆柱形浮子的数值模型,对双圆柱形浮子在波浪作用下的运动响应进行了研究。同时利用物理模型试验,分析波高和波浪周期等参数对浮式防波堤性能的影响。
[Abstract]:With the rapid growth of global energy consumption, energy security and energy environment issues have been paid more and more attention. Scientists all over the world are working hard to study, develop and utilize new energy sources. Ocean energy has attracted the attention of countless researchers with its unique charm. Ocean energy is not only a large reserve, but also a wide variety. The ocean wave energy is ubiquitous and relatively small due to time constraints, and the energy flow density of the wave energy is higher, which can capture the larger energy through a smaller device. Therefore, scientists all over the world have proposed many kinds of wave energy absorption devices, but they are not commercialized, which is an urgent problem. The traditional oscillating float wave energy device needs to set up support or base system for the device at sea, which greatly increases the cost of investment and limits the scale and commercialization of wave energy device. One way is to use existing floating bodies or other offshore structures as support systems for wave energy conversion devices, such as floating breakwaters, by building multifunctional offshore structures. When a wave train passes through a wave energy device, the wave height after passing through the device is reduced because some wave energy is extracted by the wave energy device. Therefore, the wave energy device is similar to the breakwater. The breakwater simply reflects the wave back to the sea, while the wave energy device extracts part of the wave energy and converts it into electric energy. Therefore, the combination of floating breakwater and wave energy conversion is a feasible choice. Based on this, a floating breakwater structure with the function of wave energy conversion is proposed, and the hydrodynamic characteristics of the structure are studied. In this paper, a two-dimensional viscous numerical wave flume is established by using finite element method and VOF technique, and a cylindrical floating breakwater with wave energy conversion function is studied. This paper mainly studies the motion response of floating breakwater under the action of waves, and probes into the influence of parameters such as section size and damping coefficient of floating body on the wave dissipation performance and wave energy extraction efficiency of a single cylindrical floating breakwater. Considering the limited wave dissipation effect of a single cylindrical floating breakwater, a numerical model of double cylindrical float is established, and the motion response of double cylindrical float under the action of wave is studied. The influence of wave height and wave period on the performance of floating breakwater is analyzed by physical model test.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U656.2

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