潮汐通道地貌特征數(shù)值模擬
本文關(guān)鍵詞:潮汐通道地貌特征數(shù)值模擬 出處:《大連理工大學(xué)》2016年碩士論文 論文類(lèi)型:學(xué)位論文
更多相關(guān)文章: 潮汐通道 地貌特征 數(shù)值模擬
【摘要】:潮汐通道,也叫潮汐汊道,是連接海灣與瀉湖或河口灣之間的水道,分布于世界上許多海岸段,同時(shí)也是重要的港口資源,在航運(yùn)和旅游休閑上具有很大的價(jià)值,人們非常重視對(duì)潮汐通道的研究。本文建立了一種潮汐通道演變的數(shù)值模型,包括水動(dòng)力、泥沙輸移及地形演變?nèi)齻€(gè)部分,采用ADI格式求解水動(dòng)力方程和泥沙輸移方程,采用WENO格式求解地形演變方程。本文通過(guò)水動(dòng)力對(duì)比Mike21數(shù)值解、泥沙輸移對(duì)比理論解析解、地形演變對(duì)比前人模擬結(jié)果來(lái)驗(yàn)證模型的正確性。探討影響潮汐通道地形演變的某些因素,并對(duì)這些因素的具體影響進(jìn)行分析,這些因素包括推移質(zhì)、懸移質(zhì)、輸沙率公式、潮位、泥沙中值粒徑。引入干濕邊界和地貌因子來(lái)模擬Marciano等建立的瓦登海算例,結(jié)果表明本文模型可以實(shí)現(xiàn)瓦登海的長(zhǎng)期模擬。以Roelvink算例為模擬對(duì)象進(jìn)行互比,分析了不同輸沙率公式的演變結(jié)果。將計(jì)算模型應(yīng)用于膠州灣,模擬了膠州灣潮汐通道海灣地形,得到初步結(jié)果。
[Abstract]:Tidal channels, also known as tidal inlets, are channels connecting the bay with lagoons or estuaries. They are distributed in many coastal sections of the world and are also important port resources. Because of its great value in shipping and tourism and leisure, people attach great importance to the study of tidal channels. In this paper, a numerical model of tidal channel evolution, including hydrodynamics, is established. The hydrodynamic equation and sediment transport equation are solved by ADI scheme in the three parts of sediment transport and topographic evolution. The WENO scheme is used to solve the topographic evolution equation. In this paper, the hydrodynamic contrast Mike21 numerical solution and the sediment transport contrast theory analytical solution are used. In order to verify the correctness of the model, some factors affecting the topographic evolution of tidal channels are discussed, and the specific effects of these factors, including bed load and suspended mass, are analyzed. The formula of sediment transport rate, tidal level, median particle size of sediment, dry and wet boundary and geomorphologic factors are introduced to simulate the Waden Sea case established by Marciano. The results show that the model can be used to simulate the Wadden Sea for a long time. Taking Roelvink as an example, the evolution results of different sediment transport rate formulas are analyzed. The calculation model is applied to Jiaozhou Bay. The bay topography of the tidal passage in Jiaozhou Bay is simulated and the preliminary results are obtained.
【學(xué)位授予單位】:大連理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:P737
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