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Spectral Bandwidth and Wave Period Relationships: Insights for Offshore Engineering and Sea State Prediction

Akandu, Ezebuchi Onyeche, Emmanuel O.

Abstract

This paper examines the complex relationship between wave spectral bandwidth and characteristic wave periods, particularly the zero up-crossing period (Tz). Building on theoretical models such as the Neumann spectrum, the study evaluates how spectral bandwidth influences sea state dynamics, wave energy distribution, and offshore structural responses. The analysis underscores the limitations of existing models for short-period, chaotic seas and highlights the improved accuracy for long-period swell conditions. By integrating insights from observational data, spectral analysis, and numerical simulations, this work emphasizes the practical implications for wave forecasting, wave energy conversion , and coastal engineering. Recommendations include the refinement of spectral models, incorporation of spectral bandwidth into forecasting systems, and adaptive offshore design approaches.

Keywords

Wave heightWave SpectrumSpectral Bandwidthzero up-crossing PeriodWave Energy ConversionMomentLong-period SeaShort-period seaSwell.

References

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