Open AccessWAVE-INDUCED OSCILLATIONS OF SMALL MOORED VESSELS
Author(s) -
Fredric Raichlen
Publication year - 1966
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v10.70
Subject(s) - mooring , standing wave , resonance (particle physics) , mechanics , natural frequency , geology , physics , waves and shallow water , surge , wind wave , spring (device) , coupling (piping) , acoustics , breaking wave , free surface , surface wave , meteorology , wave propagation , materials science , vibration , oceanography , optics , particle physics , thermodynamics , metallurgy
This study deals with the motions of a neutrally buoyant rectangular parallelpiped moored by a linear spring system m standing waves. The results show that a linear theory which considers the response of the body as a smgle-degree-of-freedom oscillator adequately describes the surge motion for standing waves ranging from shallow-water waves to deep-water waves and for ratios of body length to wave length of from 0.1 to 1 5. It was found that the response curves for surge motion become more selective with respect to frequency in the vicinity of resonance as the distance of the body from a reflecting surface increases. Therefore, coupling this with viscous effects, which are more important near resonance, it is possible to reduce the effect of resonance considerably for a moored body with a particular natural frequency by choosing the proper mooring location in its standing wave environment. This has possible application in the planning of berthing facilities in marinas.