波浪数物耦合模型的一种新的信号滤波方法  

A new filtering method for coupling of numerical and physical model in simulation of wave propagation

作　　者：阳志文[1] 柳淑学[1] 李金宣[1] 孙忠滨[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116023

出　　处：《水道港口》2011年第3期153-160,共8页Journal of Waterway and Harbor

基　　金：国家自然科学基金资助项目(51079023);国家自然科学基金创新研究群体项目(50921001)

摘　　要：以二维波浪传播数模与物模耦合模型规则波低频滤波问题为研究对象,采用摄动法建立了线性补偿滤波方法。耦合模型中,数值模拟采用基于改进Boussinesq方程的三角形网格有限元模型,物理模拟采用推板式造波机。文中分析了耦合模型信号滤波的目的和目标,并通过造波信号频域的分析,对比了文中方法与传统方法在信号稳定性方面的效果,通过波浪耦合模拟实验对比了波面的数模与物模结果。实验结果表明,与传统方法相比,文中方法能有效解决造波信号的慢漂和计算值偏小的问题,信号更加稳定,耦合误差更小。To filter the low-frequency disturbance in the coupling of numerical and physical model for the 2D simulation of regular wave propagation,a linear compensation formula based on perturbation theory was derived firstly.In the combined model,a triangular finite element model based on modified Boussinesq equations was chosen for the numerical wave computation,and a 2D piston-type wave maker system was used for the physical wave generation.The motive and target of the filter were discussed.The efficiency in filtering low-frequency disturbance was investigated through the analysis of the frequency variation of wave maker signal.The discrepancies between the numerical and physical results through various wave simulation show that method given in this paper can more effectually handle the problems of low-frequency disturbance and attenuation in physical results than traditional method.

关 键 词：波浪传播模拟 耦合模型 低频滤波 线性补偿 

分 类 号：O353.2[理学—流体力学] O411.3[理学—力学]