Statistical Properties of Envelope Field for Gaussian Sea Surface
(2002) 21st International Conference on Offshore Mechanics and Arctic Engineering In Proceedings of OMAE'02 Abstract
 The envelope process is a useful analytical tool which is often used to study wave groups. Most research on statistical properties of the envelope, and thus of wave groups, was focused on one dimensional records. However for the marine application, an appropriate concept should be two dimensional in space and variable int time. Although a generalization to higher dimensions was introduced by Adler (1978), little work was done to investigate its features. Since the envelope is not defined uniquely and its properties depend on a chosen version, we discuss the definition of the envelope field for a two dimensional random field evolving in time which serves as a model of irregular sea surface. Assuming Gaussian distribution of this field we... (More)
 The envelope process is a useful analytical tool which is often used to study wave groups. Most research on statistical properties of the envelope, and thus of wave groups, was focused on one dimensional records. However for the marine application, an appropriate concept should be two dimensional in space and variable int time. Although a generalization to higher dimensions was introduced by Adler (1978), little work was done to investigate its features. Since the envelope is not defined uniquely and its properties depend on a chosen version, we discuss the definition of the envelope field for a two dimensional random field evolving in time which serves as a model of irregular sea surface. Assuming Gaussian distribution of this field we derive sampling properties of the height of the envelope field as well as of its velocity. The latter is important as the velocity of the envelope is related to the rate at which energy is transported by propagating waves. We also study how statistical distributions of group waves differ from the corresponding ones for individual waves and how a choice of a version of the envelope affects its sampling distributions. Analysing the latter problem helps in determination of the version which is appropriate in an application in hand. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/630272
 author
 Podgorski, Krzysztof ^{LU} and Rychlik, Igor ^{LU}
 organization
 publishing date
 2002
 type
 Chapter in Book/Report/Conference proceeding
 publication status
 published
 subject
 in
 Proceedings of OMAE'02
 conference name
 21st International Conference on Offshore Mechanics and Arctic Engineering
 external identifiers

 Scopus:0036441769
 language
 English
 LU publication?
 yes
 id
 db0ad0356192402c83e7a104cc01e49e (old id 630272)
 date added to LUP
 20071129 13:51:35
 date last changed
 20161013 04:54:45
@misc{db0ad0356192402c83e7a104cc01e49e, abstract = {The envelope process is a useful analytical tool which is often used to study wave groups. Most research on statistical properties of the envelope, and thus of wave groups, was focused on one dimensional records. However for the marine application, an appropriate concept should be two dimensional in space and variable int time. Although a generalization to higher dimensions was introduced by Adler (1978), little work was done to investigate its features. Since the envelope is not defined uniquely and its properties depend on a chosen version, we discuss the definition of the envelope field for a two dimensional random field evolving in time which serves as a model of irregular sea surface. Assuming Gaussian distribution of this field we derive sampling properties of the height of the envelope field as well as of its velocity. The latter is important as the velocity of the envelope is related to the rate at which energy is transported by propagating waves. We also study how statistical distributions of group waves differ from the corresponding ones for individual waves and how a choice of a version of the envelope affects its sampling distributions. Analysing the latter problem helps in determination of the version which is appropriate in an application in hand.}, author = {Podgorski, Krzysztof and Rychlik, Igor}, language = {eng}, series = {Proceedings of OMAE'02}, title = {Statistical Properties of Envelope Field for Gaussian Sea Surface}, year = {2002}, }