An approximation model for nonlinear wave induced moment on a vertical surface-piercing column

Xingya Feng, P. H. Taylor, S. Dai, S. Day, T. A.A. Adcock

Research output: Chapter in Book/Conference paperConference paper

Abstract

This study focuses on the analysis of the higher harmonic wave moments (around the seabed) on a vertical cylinder under the action of focused wave groups. The moment is known to be more nonlinear than the horizontal wave force; however, it is not very much investigated in the literature due to the difficulty of measuring accurately the mudline moment. We analysed the carefully measured wave loads from the tests in the Kelvin tank in the University of Strathclyde where a four-phase method is employed to extract the harmonic wave loads. The mudline moment shows a ‘Stokes-like’ underlying harmonic structure similar to the horizontal force. An approximation model is established to estimate the harmonic moment from the linear moment component. The model requires the nonlinear horizontal force coefficients and the moment arm of each harmonic. The moment arm for each higher harmonic is found from the measured forces and moments. The approximation model is demonstrated to be successful from both the measured data and numerical simulation.

Original languageEnglish
Title of host publication30th International Ocean and Polar Engineering Conference
PublisherInternational Society of Offshore and Polar Engineers
Pages1889-1895
Number of pages7
ISBN (Electronic)9781880653845
Publication statusPublished - 2020
Event30th International Ocean and Polar Engineering Conference - Virtual, Online
Duration: 11 Oct 202016 Oct 2020

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume2020-October
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference30th International Ocean and Polar Engineering Conference
Abbreviated titleISOPE 2020
CityVirtual, Online
Period11/10/2016/10/20

Fingerprint

Dive into the research topics of 'An approximation model for nonlinear wave induced moment on a vertical surface-piercing column'. Together they form a unique fingerprint.

Cite this