Transient tension measurements during mooring deployments

Author

Hamilton, Jim M.

Author_Institution

Fisheries & Oceans Canada, Bedford Inst. of Oceanogr., Dartmouth, NS, Canada

Volume

1

fYear

1997

fDate

6-9 Oct 1997

Firstpage

134

Abstract

Tensions recorded during the deployment of subsurface moorings using the “buoy first” technique demonstrate that transient peaks in tension occur which exceed the tension measured during the steady state descent of the mooring to the bottom. These tension peaks occur just after anchor impact, when the main float overshoots and then oscillates vertically as it settles to its final equilibrium position. This behaviour is modelled as that of a mass-spring oscillator, providing 1) a method for estimating the added mass of the top float, and 2) a tool for predicting peak tensions and instrument overshoot during the deployment operation

Keywords

marine systems; oceanographic equipment; anchor impact; buoy; deployment; float overshoot; instrument overshoot; marine equipment; mass-spring oscillator; mechanical cable dynamics; mooring line stress; ocean; oscillation; subsurface mooring; transient peak; transient tension; underwater apparatus; Acceleration; Aquaculture; Drag; Instruments; Oscillators; Predictive models; Sea measurements; Sea surface; Shape; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '97. MTS/IEEE Conference Proceedings

Conference_Location

Halifax, NS

Print_ISBN

0-7803-4108-2

Type

conf

DOI

10.1109/OCEANS.1997.634349

Filename

634349