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原文传递 Field Measurements of Inhomogeneous Wave Conditions in Bjornafjorden

题名：	Field Measurements of Inhomogeneous Wave Conditions in Bjornafjorden
正文语种：	英文
作者：	Zhengshun Cheng1; Erik Svangstu2; Zhen Gao3; Torgeir Moan, F.ASCE4
作者单位：	1Postdoctoral Fellow, Dept. of Marine Technology, Centre for Ships and Ocean Structures, Centre for Autonomous Marine Operations and Systems, Norwegian Univ. of Science and Technology, Trondheim 7491, Norway (corresponding author). 2Engineer, Norwegian Public Roads Administration, Leikanger 6863, Norway. 3Professor, Dept. of Marine Technology, Centre for Ships and Ocean Structures, Centre for Autonomous Marine Operations and Systems, Norwegian Univ. of Science and Technology, Trondheim 7491, Norway. 4Professor, Dept. of Marine Technology, Centre for Ships and Ocean Structures, Centre for Autonomous Marine Operations and Systems, Norwegian Univ. of Science and Technology, Trondheim 7491, Norway.
关键词：	Wave conditions; Fjord; Field measurement; Ship waves; Inhomogeneous waves
摘要：	Due to the complex topography in a fjord, wave conditions differ from those of ocean waves. In this study, characteristics of wave conditions in the Bj?rnafjorden in Hordaland County, Norway were thoroughly investigated based on field measurements. Bjornafjorden is approximately 4,600 m wide and more than 500 m deep, with a complex hydrography and topography. Three Datawell Waveriders (DWRs, Datawell, Haarlem, Netherlands) were deployed to measure the wave data. Due to two ferry routes nearby, the measured raw data were found to be influenced by ship waves. Thus, a band-pass filter based on wavelet and inverse wavelet analyses was proposed and developed to detect and remove ship waves from raw data. The wave data analyzed were measured over approximately 19 months. The wave conditions measured by each DWR were characterized by several parameters, such as significant wave height, average zero upcrossing period, and dominant direction. The values of each wave parameter at each DWR usually differed, which indicates that the wave field in Bjornafjorden is inhomogeneous. The statistical values of these parameters among the three DWRs were correlated to some extent. Their distribution could not be fitted by a suitable distribution function unless more data were available. The coherence among the three DWRs was fairly low.
出版年：	2019
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
卷：	145
期：	1
页码：	1-22