吸收式造波机理论

【作者】 王先涛；

【导师】 柳淑学；

【作者基本信息】 大连理工大学 ， 港口、海岸及近海工程， 2002， 硕士

【摘要】 作为一种较新的试验模拟技术的设备，吸收式造波机可以解决水力学试验中的多次反射问题，因而在解决港口、海岸及近海工程问题的时候，可以提高模型试验的实验精度。本文主要在国内外相关研究的基础上深入研究了吸收式造波机理论的应用，解决了吸收式造波机的程序控制和吸收效果的评估问题。 本文的前部分在已有研究成果的基础上，推导了吸收式造波机的运动控制方程；并且着重研究了将其应用于计算机程序控制的问题。另外，由于不规则波包含无限个频率，因而使得造波板控制方程中的参数无法求解。本文地针对这个问题提出了代表频率加权平均法，使复杂的理论方程上具有了可操作性和较强的实用性。 最后，讨论了对于吸收式造波效果的评价和分析方法，提出了波形稳定性和吸收率等概念。使用这些概念和方法可以定量分析造波机的吸收效果。 按照本文提出的方法编写了造波机控制程序，并进行了吸收式造波实验，结果证明这种方法能够有效地解决波浪实验过程中的多次反射的问题。更多还原

【Abstract】 As a better kind of modeling technology, absorbing wave-maker can solve the problemof multi-reflective waves in hydraulic laboratory, thus improve the precision of hydraulicexperiment when model is used to resolve the problems of harbor, offshore and coastal. engineering. This paper mainly discuss the application of the theory of absorbingwave-maker.On the basis of some achievements relative to absorbing wave-maker which were made by some experts overseas, the former part of this thesis is mainly focus on the theory of absorbing wave-maker and its practicability in engineering. A new absorbing method of irregular waves, which is called the weighted averaging method of representative frequencies, is proposed in this paper.The analysis and assessment method of the effectiveness of the proposed absorbing wave-maker theory is discussed in the last part of this paper. And several conceptions, such as stability of waves and absorptivity, are given, which made it possible to evaluate the effectiveness of the wave-maker quantificationallyThe result of a series of experiments which using the new method certify that the methods are effective to resolve the problem of multi-reflection in wave flume.更多还原