波浪对大连湾海床冲淤影响的数值研究
发布时间：2018-11-25 22:51
【摘要】：波浪对河口海岸地区泥沙输运和海底地形演变的影响是实际海岸工程中最关心的难点问题之一。如今,计算机技术的发展日新月异,数值模拟技术在海岸工程中的应用也更加广泛。目前,国内外对于波流共同作用下的泥沙数值模拟的研究取得了很大的进展。建立考虑波流相互影响的数值模型,在相关海域开展水动力以及物质输运的数值模拟,对海洋工程、海岸防护、环境保护等方面有着重要的意义。 本文以陆域岸线几乎全部人工化的大连湾为研究对象,将波浪场产生的辐射应力耦合到潮流运动方程和悬沙输运方程中,采用非结构化网格对计算区域进行剖分,建立了波流共同作用下的二维悬沙数学模型。纯潮流作用下、常浪作用下、强浪作用下的模拟结果进行分析表明：由于常浪的波高与周期都较小,以及大连湾的水深较大、周围没有泥沙来源等因素,常浪作用下,波浪对大连湾流场、悬沙浓度、海床冲淤变化均无明显改变；但在恶劣天气时,强浪对大连湾流场、悬沙浓度、海床冲淤变化有较明显的影响。
[Abstract]:The influence of wave on sediment transport and submarine topography evolution in estuarine and coastal areas is one of the most difficult problems in practical coastal engineering. Nowadays, with the rapid development of computer technology, numerical simulation technology is more widely used in coastal engineering. At present, great progress has been made in the research of sediment numerical simulation under the interaction of wave and current at home and abroad. The numerical model considering the interaction of waves and currents and the numerical simulation of hydrodynamic and mass transport in the relevant sea areas are of great significance to marine engineering, coastal protection, environmental protection, and so on. In this paper, the radiation stress generated by wave field is coupled to tidal current motion equation and suspended sediment transport equation, and the unstructured grid is used to divide the calculated area. A two-dimensional suspended sediment mathematical model under the action of wave and current is established. The simulation results under pure tidal current, constant wave and strong wave show that the wave height and period are small, and the water depth of Dalian Bay is larger, and there is no sediment source around it. The wave has no obvious change on the current field, suspended sediment concentration and the scour and deposition of the seabed in Dalian Bay. But in the severe weather, the strong waves have obvious influence on the current field, suspended sediment concentration and the sea bed scour and silt change in Dalian Bay.
【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】：TV148
[Abstract]:The influence of wave on sediment transport and submarine topography evolution in estuarine and coastal areas is one of the most difficult problems in practical coastal engineering. Nowadays, with the rapid development of computer technology, numerical simulation technology is more widely used in coastal engineering. At present, great progress has been made in the research of sediment numerical simulation under the interaction of wave and current at home and abroad. The numerical model considering the interaction of waves and currents and the numerical simulation of hydrodynamic and mass transport in the relevant sea areas are of great significance to marine engineering, coastal protection, environmental protection, and so on. In this paper, the radiation stress generated by wave field is coupled to tidal current motion equation and suspended sediment transport equation, and the unstructured grid is used to divide the calculated area. A two-dimensional suspended sediment mathematical model under the action of wave and current is established. The simulation results under pure tidal current, constant wave and strong wave show that the wave height and period are small, and the water depth of Dalian Bay is larger, and there is no sediment source around it. The wave has no obvious change on the current field, suspended sediment concentration and the scour and deposition of the seabed in Dalian Bay. But in the severe weather, the strong waves have obvious influence on the current field, suspended sediment concentration and the sea bed scour and silt change in Dalian Bay.
【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】：TV148
【参考文献】
相关期刊论文 前10条
1 李孟国,王正林;瓯江口潮流数值模拟[J];长江科学院院报;2002年02期
2 董文军,陈虹;迎风有限元法在三维潮流数值模拟中的应用[J];海洋与湖沼;1997年03期
3 白玉川,顾元h，
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