Author(s): Christina Carstensen; Gregor Melling; Bernhard Kondziella; Lars Tretau

Linked Author(s):

Keywords: Wave generation; Laboratory scale; Closed loop control; Ship-generated waves; Primary-wave system

Abstract: A pump-driven generation method was implemented in a newly constructed closed-circuit flume to model long-period ship waves in laboratory scale. With increasing sizes of ships travelling the waterways, higher impacts on embankments and greater damages at structures occur, especially due to long-period, primary ship waves. Tools for predicting future wave loads and associated hydrodynamic processes are required. To investigate long-period waves in a controlled parameter space, two impeller pumps were used to generate a propagating wave with both positive and negative water level changes in the flume. A closed loop control system with a PID controller was applied to attain the desired water level elevation. The setup was successfully validated for single sinusoidal and solitary waves, a N-wave and a long tsunami wave of varying heights and durations. Idealised long-period primary ship waves in laboratory scale (1:10) were generated, their characteristic water level displacements (drawdown and stern wave) were well reproduced. The applied generation technique proved to be suitable for the future investigation of ship-induced loads and their impacts.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p1563-cd

Year: 2023