多板主动吸收造波技术实验研究

Experimental study on multi-plate active absorption wavemaker technology

文章基于主动吸收造波理论,以波高反馈的控制方式设计了一套完整的多板主动吸收造波控制系统。进一步通过水池物理模型实验,以两点法计算对比了主动吸收与非主动吸收造波的效果。实验结果表明,该系统可以实现二维规则波和不规则波的主动吸收式造波。在此基础之上,对比验证了多板控制方式的优势。由于反射结构的三维特性,即使进行二维造波,水池横向各处的反射波浪也会出现很大差异,而多板异步运动的主动吸收造波可以在二维造波过程中有效地约束这种差异,提高造波质量,延长稳定造波时间,该技术具有一定的研究和实用价值。

Active-absorption wavemaker technology is a feedback-control technology which solves the re-reflection problem in real time and restores the real wave field in wave experiment.A multi-plate active-absorption wavemaker control system was designed based on active-absorption theory and combined with the wave height feedback control mode,and the progressive wave performance of active-absorption and non-active-absorption wavemaker calculated by wave separation method was compared based on the physical model experiment of water tank.The experimental results show that the system can realize the active-absorption of two-dimensional regular wave and irregular wave.On this basis,the advantages of multi-plate control mode were compared and verified.Experimental result shows that the wave in the transverse direction of the pool will be greatly different even if carrying out two-dimensional experiment.The multi-plate active absorption system can effectively restrain this difference in the process of two-dimensional wave experiment by asynchronous motion between plates,which improves the quality of wave and prolong the stable experiment time.This technology has certain research value and practical value.