A Transient Wave Generation Technique and Some Engineering Applications,
NAVAL ACADEMY ANNAPOLIS MD
Pagination or Media Count:
Another method has been developed for generating transient waves using the dispersion relationship of water waves. This technique consists of generating a drive signal which combines decreasing frequency with an exponentially increasing amplitude of specified form. The resulting wave energy which is focused at some point downstream of the wavemaker can result in some nonlinear, asymmetric, andor breaking waves occuring repeatably at the same location in the tank. Location of the breaking wave relative to the predicted convergence point is discussed and the derivation and computation of the drive signal as generated ona Tektronix 4051 microcomputer is described. Some specific examples of the model testing and research applications of this wave generation technique are also described. These include controlled extreme environment testing, capsizing of small vessels in breaking waves, ship responses to episodic waves, and a continuation of deck wetness experiments.