Statistical properties of ocean wave groups

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Naval Postgraduate School , Monterey, California
ContributionsNaval Postgraduate School (U.S.)
The Physical Object
Pagination1 v. :
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Open LibraryOL25505846M

: A study of ocean wave statistical properties: using nonlinear, directional, phase-resolved ocean wavefield simulations (): Henry, Legena: BooksPrice: $ Presentation of statistics data, analysis of wave groups and the role of different factors like resonance in the formation and dynamics of large-amplitude waves The occurrence of extreme waves, their variational and average wave conditions are studied on the basis of data from long-term observations.

The fundamental property of surface waves induced by wind is their irregularity. The prediction of wave parameters can be achieved through stochastic analysis only. This analysis can be developed in two basic domains, i.e. frequency and probability : Stanisław R. Massel. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http Author: Arthur Ronald Nelson.

Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): ersitylibrary (external link). Statistics of Ocean Wave Groups. ABSTRACT. Statistical parameters are derived that describe the occurrence probability for the number and height of consecutive waves in a group, which are large compared to the average wave height.

Such wave groups can create extreme forces in mooring lines of large vessels. nant four-wave interaction in Fourier space, results in the formation of large amplitude waves (or rogue waves) [7] which affect the statistical properties of the surface eleva-tion (see, for example, [8]).

This is particularly true if the ratio between the wave steepness and the spectral band-width, known as the Benjamin-Feir Index (BFI), is.

One of the dangerous situations for ships navigating in following and quartering seas is to encounter occasionally a group of high waves, i.e. high run, which may be larger than those observed in ocean wave itself. to investigate the statistical properties of the encounter wave grouping by: 3.

Surface elevation distribution in response to input spectral properties, 2. Wave definition methods in an irregular wavefield with a two-dimensional wave number, 3. Wave height/wavelength distributions in response to input spectral properties, including the occurrence and spacing of large wave events (based on definitions in 2).

In order to predict high waves, understanding ocean wave height statistics has become an important matter for civil engineering, especially for safety and prevention reasons. The present study, which focuses on deep water, has gained insight into some of the most important existing theories of short term statistics.

A new method using group-induced second-order long waves (GSLW) to describe wave groups is presented in this paper on the basis of the GSLW theory by Longuet-Higgins and Steward ().

In the method, the parabolic relationship between GSLW and the wave envelope is first deduced, and then the distribution function of GSLW amplitude is by: 2.

Previously, the regular waves (signle frequency and amplitude) have been studied. However, ocean waves are almost irregular. Introduction 1. How to use wave statistics and wave to describe (or simulate) irregular waves. How to use the previous knowledge based on (regular) linear wave theory to calculate the properties of irregular waves File Size: KB.

This book provides an example of a thorough statistical treatment of ocean wave data in space and time. It demonstrates how the flexible framework of Bayesian hierarchical space-time models can be applied to oceanographic processes such as significant wave Brand: Springer-Verlag Berlin Heidelberg.

ANALYSES OF OCEAN WAVE GROUPS Hudspeth and Medina () and Medina and Hudspeth () ana- lyzed the three-axes representation for the average length of run of discrete waves and the envelope using both physical and numerically simulated by: This study deals with the statistical properties of the group formation of random waves determined by the zero-up-cross method.

Transition probabilities are given by the 2-dimensional Rayleigh distribution for the wave height train and the 2-dimensional Weibull distribution for the wave period train. The Science of Ocean Waves: Ripples, Tsunamis, and Stormy Seas by J.

Zirker is a fascinating look at ocean waves and the science behind the discoveries of those who have studied ocean waves.

Description Statistical properties of ocean wave groups PDF

Rather than being presented in a complicated manner, this very informative book is also written and illustrated in a straightforward manner for the Cited by: 2. It is shown that some recent data on the crest‐to‐trough heights of sea waves are fitted just as well as by the one‐parameter Rayleigh distribution as by the two‐parameter Weibull distribution, provided that the rms amplitude ā is taken as (2m 0) 1/2, where m 0 is the lowest moment of the frequency spectrum.

Reasons why the ratio ā/(2m 0) 1/2 should differ from unity are. Some new results on statistical properties of wind waves PAOLO BOCCOTTI lstituto di Idraulica, via Montallegro 1, Genova, Ital) For wind waves modelled by a stationary Gaussian process ~'(t) (~" = height above m.w.1, of one point of the free surface) it is shown that, in a time interval including an instant tm Cited by:   Random waves are the most important constituent of the sea environment, as they make the design of maritime structures quite different from that of structures on land.

In this book, the concept of random waves for the design of breakwaters, seawalls, and harbor structures is fully explored for easy comprehension by practicing engineers.

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An exciting subject dealt with in the book is the quasi-deterministic mechanics of three-dimensional wave groups in sea storms, and the loads exerted by these wave groups on offshore structures.

The text is intended for researchers and graduate students in ocean engineering, but may also be understood by : dispersion relation for ocean waves, which is introduced and ex-plained in chapter 1. principle of wave superposition, which is explained and illustrated in chapters 2 and 3.

Strictly speaking, these two postulates apply only to ocean waves of very small amplitude. Nevertheless, a great many useful facts may be deduced. Statistics on wave heights and periods for the North Atlantic Ocean R.

Brooks Office of the Supervisor of Shipbuilding and Naval Inspector of Ordnance, New York Shipbuilding Corporation, Camden 1, New JerseyCited by: 3.

This collection contains papers that explore major advances in wave measurement and quantification of ocean and lake waves, including technical knowledge and applications in wave theory, characteristics, design, and techniques. Papers are national and international in scope and include practical examples and case histories.

A small wave for my smile, A small wave for my voice, A small wave for my laughter, A small wave for my choice. A small wave for my sight, A small wave for my wealth, A small wave for my generosity, A small wave for my health. A small wave for my truth; Mother Ocean, I ask for nine waves of grace upon me.

Source: Sea Magic by Sandra Kynes. Wave energy is associated with a group of waves. Waves in a group are dynamic as they travel with smaller waves at the leading (front) and trailing (rear) sides of the group, and larger waves in the middle.

Waves move through the group from the rear to the front, first gaining in size, then shrinking as they approach the front of the group.

essential properties of the wave conditions. Fortunately, it turns out that the linear wave theory we discussed in Part A is a good starting point. In fact, it turns out be a good model of the sea surface to consider it made up from a lot of regular plane waves.

This model is called random linear wave Size: KB. A study of ocean wave statistical properties using nonlinear, directional, phase-resolved ocean wave- eld simulations by Legena Albertha Henry Submitted to the Department of Mechanical Engineering on Novemin partial ful llment of the requirements for the degree of Master of Science in Mechanical Engineering Abstract In the present.

Overview of ocean wave statistics 23 Windowing It has been seen that a record of length D can be mathematically described as the superposition of a number of sinusoidal waves, each having an exact number of periods in duration D (∆f=1 D).

Details Statistical properties of ocean wave groups EPUB

Nevertheless, the sea actually consists of a continuous spectrum of waves. The. Interference of two sinusoidal waves with slightly different wavelengths, but the same amplitude and propagation direction, results in a beat pattern, called a wave can be seen in the animation, the group moves with a group velocity c g different from the phase velocity c p, due to frequency dispersion.

The group velocity is depicted by the red lines (marked B) in the two. In a unitary way, this monograph deals with a wide range of subjects related to the mechanics of sea waves.

The book highlights recent theoretical results on the dynamics of random wind-generated waves, on long-term wave statistics, and on beach planform evolution. A fresh approach is given to more traditional concepts. For example, new evidence from a recent.

Experimental investigation on statistical properties of wave heights and crests in crossing sea conditions. Ocean shows that this conditio n The Markov wave group theory, formulated by .Statistical description of waves. The relations between largest wave height and significant wave height indicate that the sea state has certain statistical properties.

A statistical description is based on the representation of the wave field through the energy spectrum.Waves. The word wave may bring to mind images of the ocean or a lake, but waves can occur in several different forms. The two main types of waves are mechanical waves and electromagnetic waves.

Mechanical waves are disturbances in any medium or substance. Examples of mechanical waves include the movement of water, from ripples in a puddle to giant rolling waves on the surface of the open ocean.