【摘要】：近年來,隨著港口建設(shè)不斷向深水?dāng)U展和海洋水產(chǎn)養(yǎng)殖業(yè)的蓬勃發(fā)展,以及游艇碼頭和海濱浴場的大量興建,浮式防波堤作為水域掩護的人工屏障,受到了越來越多的關(guān)注。與傳統(tǒng)重力式防波堤相比,浮式防波堤具有結(jié)構(gòu)型式簡單美觀、造價低廉、環(huán)保、對水域深度和地基條件的適應(yīng)性較強、建造及拆遷方便等優(yōu)點。然而浮式防波堤仍存在對長周期波浪透過率較高、耐久性和安全性較差等缺點,制約了其從研究型向?qū)嵱眯偷霓D(zhuǎn)變。因此,尋求結(jié)構(gòu)型式合理、消浪效果良好且安全性能可靠的浮式防波堤結(jié)構(gòu)具有重要意義。 本文提出了錨鏈錨固的雙浮箱-水平板新型浮式防波堤結(jié)構(gòu),通過規(guī)則波物理模型試驗研究,系統(tǒng)分析了浮堤相對寬度、水平板層數(shù)、水平板間距、錨鏈剛度和相對波高等因素對防波堤消浪性能、運動響應(yīng)特性和錨鏈?zhǔn)芰μ匦缘挠绊憽?研究結(jié)果表明,對于周期較長波浪,雙浮箱-水平板浮堤模型的消浪效果明顯好于雙浮箱模型,其透射系數(shù)最多可減小0.4左右,同時防波堤的穩(wěn)定性有所提高,特別是垂蕩和橫搖運動的位移幅值明顯減小,因此該新型浮堤結(jié)構(gòu)的提出具有實際意義。但與雙浮箱式防波堤相比,雙浮箱-水平板浮式防波堤的錨鏈?zhǔn)芰γ黠@增大,所以應(yīng)對浮堤錨泊系統(tǒng)的安全性能引起更大重視。 研究同時發(fā)現(xiàn),不同的結(jié)構(gòu)參數(shù)和波浪條件對浮式防波堤的水動力特性具有一定影響。在試驗研究范圍內(nèi),浮堤相對寬度和水平板層數(shù)是影響水動力特性的主要因素,水平板間距的影響較弱,而錨鏈剛度主要影響錨鏈?zhǔn)芰?相對波高對運動響應(yīng)和錨鏈?zhǔn)芰酗@著影響。本文研究工作可為新型浮式防波堤的工程實踐提供理論參考,促進浮式防波堤在我國海岸工程中的應(yīng)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.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U656.2

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相關(guān)期刊論文 前10條

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本文編號：2419987