Trial production of irregular wave absorbing system of the reflection waves.

反射波不规则波吸收系统的试制。

• 批准号: 04555128
• 负责人: KIMURA Akira
• 金额: $ 2.43万
• 依托单位: Faculty of Engineering, Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555128/
• 关键词: Irregular wave; wave generating machine; reflected wave; Controll of wave generating machine; 反射波制御

Applications of irregular wave generating machine in a laboratory wave tank to realize the irregular properties of sea waves, have become the standard technique in experimental laboratory studies. However the draw back of this machine is the existence of reflected waves from the model structures in a tank. The reflected waves by the model structure propagate toward the wave paddle and reflected by it and repropagate toward the model again. Since the wave generating machine is programd to generate the waves with the planned spectrum, these re-reflected waves become the unnecessary incoming waves to the model. This study aims at making the reflected wave absorbing system with the wave generating machine. Two theoretical methods are tried in the wave absorbing system. Those are position absorbing method and position wave profile control method. The former method works effectively in the experiments with periodic waves. The latter method, on the contrary, is effectively works in the experiments with irregular waves. The total system works much more effectively than the ordinary existing systems. The system is consisted only with a personal computer withe A/D and D/A interface board. This system can be applied to any types of existing old type irregular wave generating system to reproduce it into a "new system, ".

在实验室波浪水槽中应用不规则波发生器来实现海浪的不规则特性，已经成为实验室研究的标准技术。然而，这种机器的缺点是存在来自坦克中的模型结构的反射波。模型结构的反射波向波浪桨传播，并被其反射，然后再次向模型传播。由于造波机被编程为产生具有计划频谱的波，这些再反射波成为模型不必要的入射波。本研究旨在利用造波机制作反射波吸收系统。在吸波系统中尝试了两种理论方法。这两种方法分别是位置吸收法和位置波调剖法。前一种方法在周期波实验中是有效的。而后者在不规则波的实验中则是有效的。整个系统比现有的普通系统更有效地工作。该系统仅由一台带有A/D和D/A接口板的个人计算机组成。该系统可以应用于现有的任何类型的老式不规则波发生系统，以将其复制成“新系统”。