ANALYSES OF HINGED WAVEMAKERS FOR RANDOM WAVES

Robert T. Hudspeth; Douglas F. Jones; John H. Nath

doi:10.9753/icce.v16.20

No. 16 (1978), Conference Proceedings

No. 16 (1978)

ANALYSES OF HINGED WAVEMAKERS FOR RANDOM WAVES

Conference Proceedings

Published 1978-01-29

Robert T. Hudspeth⁺⁻
Douglas F. Jones⁺⁻
John H. Nath⁺⁻

Robert T. Hudspeth

Oregon State University

Douglas F. Jones

CONOCO, Ponca City

John H. Nath

Oregon State University

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Keywords

hinged wavemaker
random waves
wave analysis

How to Cite

ANALYSES OF HINGED WAVEMAKERS FOR RANDOM WAVES. (1978). Coastal Engineering Proceedings, 1(16), 20. https://doi.org/10.9753/icce.v16.20

Abstract

The theoretical dimensionless frequency response functions for the wavemaker stroke spectrum, Qs(iu), and for the wavemaker dynamic pressure moment spectrum, Q^{m), were verified experimentally in the Oregon State University-Wave Research Facility (OSU-WRF) from random waves which were simulated from two types of two-parameter theoretical design wave spectra. The random motions of the wavemaker were first digitally simulated by a unique inverse stacked FFT algorithm which were then used to drive the wavemaker through digital-to-analog converters (DAC). The dimensionless frequency response function for the hydrodynamic pressure moment spectrum was not measured directly but was computed from the dynamic covariance equations for a hinged wavemaker of variable-draft by linear combinations of related dimensionless frequency response functions and cross-spectral estimates. The measured estimates were found to agree reasonably well with the analytical approximations, and these measured stochastic hydrodynamic pressure moment estimates on a hinged wavemaker of variable draft are believed to be unique.

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ANALYSES OF HINGED WAVEMAKERS FOR RANDOM WAVES

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