Post processing techniques study for seakeeping tests in shallow water
Mansuy, M.; Tello Ruiz, M.Á.; Delefortrie, G.; Vantorre, M. (2017). Post processing techniques study for seakeeping tests in shallow water, in: The 5th International Conference on Advanced Model Measurement Technology for the Maritime Industry (AMT’17), 11th – 13th October 2017, Glasgow, UK: Conference Programme and Proceedings. pp. 460-473
In: (2017). The 5th International Conference on Advanced Model Measurement Technology for the Maritime Industry (AMT’17), 11th – 13th October 2017, Glasgow, UK: Conference Programme and Proceedings. University of Strathclyde Glasgow: [s.l.]. 717 pp., more
Despite the increased availability of numerical techniques, experimental analysis is still one of the most appropriate methods to study ship behaviour. For instance, the dynamics of a ship in waves are a complex problem ruled by several nonlinear phenomena, such as the free surface which can be hardly predicted, with sufficient accuracy, by any numerical method. Thus, the reliability of the measurements is not only of importance for a correct estimation of the ship behaviour but also to distinguish the phenomena involved.
Post processing tools have been commonly applied to signal measurements to disregard noise and undesired effects. Fourier analysis, curve fitting, and averaging over time intervals are post processing tools frequently used.
The present paper studies the suitability and limitations of such techniques when applied to study seakeeping model tests in shallow water. The experimental program has been conducted at Flanders Hydraulics Research (in cooperation with Ghent University) with a scale model of the DTC. Model tests comprise a variation of ship speeds, in head waves for two water depths.
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