Statistical Properties of Envelope Field for Gaussian Sea Surface
Forskningsoutput: Kapitel i bok/rapport/Conference proceeding › Konferenspaper i proceeding
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.
Detaljer
Författare  

Enheter & grupper  
Forskningsområden  Ämnesklassifikation (UKÄ) – OBLIGATORISK

Originalspråk  engelska 

Titel på värdpublikation  Proceedings of OMAE'02 
Status  Published  2002 
Publikationskategori  Forskning 
Peer review utförd  Ja 
Evenemang  21st International Conference on Offshore Mechanics and Arctic Engineering  Oslo, Norge Varaktighet: 2002 jun 23 → … 
Konferens
Konferens  21st International Conference on Offshore Mechanics and Arctic Engineering 

Land/Territorium  Norge 
Ort  Oslo 
Period  2002/06/23 → … 