双浮箱—水平板浮式防波堤影响因素试验研究
发布时间：2019-02-11 18:23
【摘要】：近年来,随着港口建设不断向深水扩展和海洋水产养殖业的蓬勃发展,以及游艇码头和海滨浴场的大量兴建,浮式防波堤作为水域掩护的人工屏障,受到了越来越多的关注。与传统重力式防波堤相比,浮式防波堤具有结构型式简单美观、造价低廉、环保、对水域深度和地基条件的适应性较强、建造及拆迁方便等优点。然而浮式防波堤仍存在对长周期波浪透过率较高、耐久性和安全性较差等缺点,制约了其从研究型向实用型的转变。因此,寻求结构型式合理、消浪效果良好且安全性能可靠的浮式防波堤结构具有重要意义。 本文提出了锚链锚固的双浮箱-水平板新型浮式防波堤结构,通过规则波物理模型试验研究,系统分析了浮堤相对宽度、水平板层数、水平板间距、锚链刚度和相对波高等因素对防波堤消浪性能、运动响应特性和锚链受力特性的影响。 研究结果表明,对于周期较长波浪,双浮箱-水平板浮堤模型的消浪效果明显好于双浮箱模型,其透射系数最多可减小0.4左右,同时防波堤的稳定性有所提高,特别是垂荡和横摇运动的位移幅值明显减小,因此该新型浮堤结构的提出具有实际意义。但与双浮箱式防波堤相比,双浮箱-水平板浮式防波堤的锚链受力明显增大,所以应对浮堤锚泊系统的安全性能引起更大重视。 研究同时发现,不同的结构参数和波浪条件对浮式防波堤的水动力特性具有一定影响。在试验研究范围内,浮堤相对宽度和水平板层数是影响水动力特性的主要因素,水平板间距的影响较弱,而锚链刚度主要影响锚链受力,相对波高对运动响应和锚链受力均有显著影响。本文研究工作可为新型浮式防波堤的工程实践提供理论参考,促进浮式防波堤在我国海岸工程中的应用。
[Abstract]:In recent years, with the continuous expansion of port construction to deep water and the vigorous development of marine aquaculture, as well as a large number of yacht marinas and beach construction, floating breakwater as a cover of artificial barriers, has received more and more attention. Compared with the traditional gravity breakwater, the floating breakwater has the advantages of simple and beautiful structure, low cost, environmental protection, strong adaptability to water depth and foundation conditions, and convenient construction and demolition. However, floating breakwater still has some disadvantages such as high transmission rate of long-period wave, poor durability and safety, which restricts the transition from research type to practical type. Therefore, it is of great significance to seek a floating breakwater structure with reasonable structure, good wave elimination effect and reliable safety performance. In this paper, a new floating breakwater structure with double floating box-water plate anchored with anchor chain is proposed. Through the experimental study of regular wave physical model, the relative width of floating embankment, the number of water slab layers and the spacing of water plate are systematically analyzed. The influence of the stiffness of anchor chain and the relative wave height on the characteristics of wave dissipation, motion response and stress of anchor chain. The results show that for long-period waves, the wave attenuation effect of the model is better than that of the model of double floating box, and the transmission coefficient can be reduced by about 0.4 at most, and the stability of the breakwater is improved. Especially, the displacement amplitude of the swaying and rolling motion is obviously reduced, so it is of practical significance to propose the new floating embankment structure. But compared with the double floating box breakwater, the anchor chain of the double floating box floating breakwater is obviously increased, so more attention should be paid to the safety performance of the floating embankment mooring system. At the same time, it is found that the hydrodynamic characteristics of floating breakwater are influenced by different structural parameters and wave conditions. In the range of experimental study, the relative width of floating embankment and the number of horizontal slab layers are the main factors affecting hydrodynamic characteristics, the influence of water plate spacing is weak, and the anchor chain stiffness mainly affects the force of anchor chain. The relative wave height has a significant effect on the motion response and the stress of the anchor chain. The research work in this paper can provide a theoretical reference for the engineering practice of the new floating breakwater and promote the application of the floating breakwater in the coastal engineering of our country.
【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】：U656.2
[Abstract]:In recent years, with the continuous expansion of port construction to deep water and the vigorous development of marine aquaculture, as well as a large number of yacht marinas and beach construction, floating breakwater as a cover of artificial barriers, has received more and more attention. Compared with the traditional gravity breakwater, the floating breakwater has the advantages of simple and beautiful structure, low cost, environmental protection, strong adaptability to water depth and foundation conditions, and convenient construction and demolition. However, floating breakwater still has some disadvantages such as high transmission rate of long-period wave, poor durability and safety, which restricts the transition from research type to practical type. Therefore, it is of great significance to seek a floating breakwater structure with reasonable structure, good wave elimination effect and reliable safety performance. In this paper, a new floating breakwater structure with double floating box-water plate anchored with anchor chain is proposed. Through the experimental study of regular wave physical model, the relative width of floating embankment, the number of water slab layers and the spacing of water plate are systematically analyzed. The influence of the stiffness of anchor chain and the relative wave height on the characteristics of wave dissipation, motion response and stress of anchor chain. The results show that for long-period waves, the wave attenuation effect of the model is better than that of the model of double floating box, and the transmission coefficient can be reduced by about 0.4 at most, and the stability of the breakwater is improved. Especially, the displacement amplitude of the swaying and rolling motion is obviously reduced, so it is of practical significance to propose the new floating embankment structure. But compared with the double floating box breakwater, the anchor chain of the double floating box floating breakwater is obviously increased, so more attention should be paid to the safety performance of the floating embankment mooring system. At the same time, it is found that the hydrodynamic characteristics of floating breakwater are influenced by different structural parameters and wave conditions. In the range of experimental study, the relative width of floating embankment and the number of horizontal slab layers are the main factors affecting hydrodynamic characteristics, the influence of water plate spacing is weak, and the anchor chain stiffness mainly affects the force of anchor chain. The relative wave height has a significant effect on the motion response and the stress of the anchor chain. The research work in this paper can provide a theoretical reference for the engineering practice of the new floating breakwater and promote the application of the floating breakwater in the coastal engineering of our country.
【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】：U656.2
【参考文献】
相关期刊论文 前10条
1 翁文凯;周宗仁;;Analysis of Responses of Floating Dual Pontoon Structure[J];China Ocean Engineering;2007年01期
2 蒋昌波;袁盛良;刘t，
本文编号：2419987
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