Reflected wave absorber of multi-directional irregular wave wave-making equipment

摘要

PURPOSE: To absorb reflected waves in many directions in an omnidirectional irregular wave generating facility. ;CONSTITUTION: The reflected wave incident to the j'th one of individually driven wave generating boards 3 in N pieces is determined by a subtracting means 32 as the difference δ_j (=μ_j-τ_j) between the target water level variation (τ_j) to be set for the board in order to generate irregular waves and the observed water level variation (μ_j) given by a wave height meter 7 on the wave generation surface of the board 3. The velocity μ_j of reflected wave absorbing motions which the j'th board 3 should make for absorbing reflected waves is calculated by a control means 36 from the difference δ_j corresponding to the reflected wave at the board 3 and the difference δ_j-1 or δ_j+1 corresponding to the reflected wave at least at the adjoining board on one side of the applicable board 3, and the reflected wave absorbing motions are made by this control means 36. For determining the reflective absorbing motion velocity u_j of each board 3, it may be accepted that all differences δ_j of boards 3 in N pieces are used or that the difference δ_j of the board 3 and differences δ_j-1 and δ_j+1 of the adjoining boards on both sides are used.;COPYRIGHT: (C)1994,JPO&Japio