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近岸直墙波浪力的模拟(王登婷)

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近岸直墙波浪力的模拟水利论文"K6aP/_-T

^3H1U8c {n6t D0【作者】王登婷 【导师】左其华
+tu(d#WCjE~f}0【作者基本信息】南京水利科学研究院,海岸工程,2002年,硕士

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%H/{%a*\K'b"z0【中文摘要】 直墙式建筑物是海岸工程中一种重要的建筑物型式。波浪作用力的大小直接影响到建筑物的安全和造价。由于近岸波浪动力主要受地形等因素的影响变化剧烈,尤其伴随着波浪破碎,增加了直墙上波浪力确定的困难。目前,直墙上波浪力的确定仍以物理模型试验为主。然而,不同的研究者所得的结果往往差异较大。造成这种差异的主要原因是由于物理模型试验中波浪的模拟方法以及波浪力资料分析方法的不同所造成的。 本文在水槽中进行平底、1:5、1:10、1:15、1:20、1:25建筑物前几种不同坡度的规则波模型试验,与数值计算相结合,讨论了波浪在斜坡及平台上传播的特性和波浪形态,对直墙上最大波压强及其作用位置以及最大总压力进行了系统的分析,进行了不同斜坡直墙波浪力的比较,给出了它们之间的转化关系。在规则波试验的基础上,本文进行了不同坡度的不规则波模型试验,并给出了不同斜坡直墙波浪力之间的转换关系。 最后,运用神经网络技术,应用改进后的BP网络,构造计算直墙波浪力的模型。通过与实测结果进行比较,证实神经网络模型应用于直墙波浪力的计算是合适的。水利论文g7zZp9O9cy

2F s+P-sj(r0【英文摘要】 A vertical structure is one of the important structures in coastal engineering. Wave forces have a great effect on safety and cost of structures. Determination of wave forces on a vertical wall is difficulty owing to violent change of near-shore wave dynamics by topographic and other factors and to subsequent wave breaking. At present, physical model tests are widely employed for determination of wave forces on a vertical wall. However, different researchers have obtained different results. The reason lies in different wave modeling methods as well as analytic methods of wave forces during wave model tests.In this paper, regular wave flume model tests are conducted on a flat-bottom and under different slopes: 1:5, 1:10, 1:15, 1:20, 1:25, respectively. Combined with numerical simulation, characteristics of wave propagation on a slope and a platform and wave forms are discussed, and the maximum wave pressure, acting position and the maximum wave forces are systematically analyzed. Compar...更多ison of wave forces on a vertical wall with different slopes is made, and a conversion relation is given. On such a basis, irregular wave model tests under different slopes are also carried out, and a conversion relation between wave forces on a vertical wall of different slopes.Finally, a model for wave forces on a vertical wall is established byuse of neural network techniques and modified BP network. Comparison between the calculated and observed results proves that application of neural network model in calculation of wave force on a vertical wall is favorable.  还原

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"Y`%m\$E1WV0【中文关键词】 近岸; 直墙; 斜坡平台; 规则波; 不规则波; 波浪力; 神经网络; BP网络
/b2r#frdhW3K0【英文关键词】 near-shore; vertical wall; slope/platform; regular waves; irregular waves; wave forces; neural network; BP network水利论文#@-Ky.ym

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TAG: 波浪 近岸 模拟 王登婷
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