点击次数：

论文类型：期刊论文

发表时间：2010-02-01

发表刊物：SCIENCE CHINA-TECHNOLOGICAL SCIENCES

收录刊物：SCIE、EI

卷号：53

期号：2

页面范围：558-565

ISSN号：1674-7321

关键字：harbor resonance; infragravity waves; wavelet-based bispectrum; wave-wave interactions

摘要：It is generally accepted that nonlinear wave-wave interactions play an important role in harbor resonance. Nevertheless it is not clear how waves take part in those interactions. The aim of this paper is to investigate those processes for a rectangular harbor at transient phases. Long-period oscillations excited by bichromatic waves are simulated by the Boussinesq model. The simulations start from calm conditions for the purpose of studying the response process. The internal wavemaker stops working after the oscillations have reached a quasi-steady state, and it is used to simulate the damp process. In order to analyze temporary features of wave-wave interactions in different states, the wavelet-based bispectrum is employed. The influence of the short wave frequencies on long-period oscillations is investigated, and reasons are tried to be given from nonlinear triad interactions between different wave components and the interaction of short waves and the bay entrance. Finally, the response time and the damp time are estimated by a simple method.