Control Signal Optimization for Non-Linear Wave Generation

• Published in: Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics
• Main Authors: Hicks, J. B. H., Bingham, H. B., Read, R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Society of Mechanical Engineers 2018
• Subjects: Arctic
• Online Access: https://orbit.dtu.dk/en/publications/3c24f327-e8cb-41c6-bbf3-a01c8f4323a2; https://doi.org/10.1115/OMAE2018-78520

This paper investigates the use of optimization for numerical-physical wave generation in wave tanks. Control signals for a wedge-shaped plunger-type wave generator are developed to produce stable non-linear, deep-water waves in both numerical and physical wave tanks. A fully non-linear potential flow solver developed at DTU is used for the numerical work. Numerical optimization proceeds by a defect correction scheme, resulting in optimized control signals for wavelengths of 0.7–2 m (corresponding to non-dimensional wave numbers kh = 2–5.5) and steepnesses of 3–11%.