Effect of sampling rate on wave height statistics

被引：17

作者：

Stansell, P ^{[1
]}

Wolfram, J ^{[1
]}

Linfoot, B ^{[1
]}

机构：

[1] Heriot Watt Univ, Dept Civil & Offshore Engn, Edinburgh EH14 4AS, Midlothian, Scotland

来源：

OCEAN ENGINEERING | 2002年 / 29卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

wave statistics; wave height; wave amplitude; wave measurement discrete sampling; Rayleigh distribution; joint height-period distribution; marginal distribution; extreme value distribution;

D O I：

10.1016/S0029-8018(01)00066-X

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

This paper examines the effects of digital processing, and therefore discretisation or sampling, of sea surface elevations that are, in reality, continuous. Using random linear wave theory, probability distributions for the measured (as opposed to actual) wave amplitudes and heights have been obtained which are conditional on the sampling rate. It is shown that with low sampling rates there are significant departures from the usual Rayleigh distribution. Rates of 1 Hz or less may lead to significant underestimation of the probability of very large waves. An analysis of full-scale measurements obtained from a platform in the North Sea supports these results. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1023 / 1047

页数：25

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