DESCRIPTION OF NATURAL SEA STATES: REQUIREMENTS TO THE REPRODUCTION IN MODELS

Proceedings of the International Conference on Coastal Engineering

H. Lundgren¹  Elias Davidsen² 

[1] Institute of Hydrodynamics and Hydraulic Engineering, Technical university of Denmark;Government Engineering Office, Faroe Islands

关键词: model reproduction;    sea state;    sea state description;   

DOI  :  10.9753/icce.v19.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

In order to attain a satisfactory reproduction in physical and numerical models of Nature's sea states, much development of the description of these sea states has to take place. This paper gives a discussion (i) of the problems that can be considered as solved today, and (ii) of the problem areas where much research is still needed. Firstly, the paper presents the basic definition of the directional spread of energy (for a given frequency) as derived from a field record. This definition is necessarily a statistical one and leads directly to the determination in practice of the directional spectrum. Secondly, the parameterization of spectra is discussed and it is proposed to express one-dimensional storm spectra by means of the four -parameter F.1 .-spectrum, which is more manageable than the JONSWAP-spectrum. Thirdly, it is concluded that the first order components of any spectrum have random phases.

【 授权许可】

Unknown