STATISTICAL DISTRIBUTION OF WAVE ORBITAL VELOCITY IN FINITE WATER DEPTH
A comprehensive field study was undertaken to determine the statistical distribution of wave orbital velocity in finite water depth. Two ocean ADV current meters were mounted on two separate stainless steel tripods to measure horizontal wave orbital velocity components ((u),(v)) andwave pressure (ξ) at a sampling rate of 2Hz for 17.07min every hour at 0.5m above the seabed in two coastal water depths of 12m and 24m. The zero-crossing method was then applied to analyse the collected field data to obtain wave orbital velocity maxima U of individual waves. It is found that the statistical distributions of (u),(v)and (ξ) are identical and obey Gaussian distribution as commonly assumed, and that the statistical distribution of U deviates from the Rayleigh distribution as U becomes larger. A two-parameter Weibull distribution is also proposed to compute the average orbital velocity Up of the first n largest orbital velocity maxima more accurately than the Rayleigh distribution.
Irregular wave orbital velocity Rayleigh distribution significant wave
Zaijin You
Department of Environment and Climate Chnage Locked Bags 1002 Dangar NSW 2309 Australia
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
1324-1329
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）