The Development of the Measurement Instrument on Water Waves

水波测量仪器的研制

• 批准号: 05555271
• 负责人: NAITO Shigeru
• 金额: $ 10.75万
• 依托单位: OSAKA 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: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555271/
• 关键词: Transmitted Light; Unsteady Wave Field; Wave Amplitude Function; Image Processing; Relative Bow Motion; 非定常波; フーリエ変換; 定常波; フーリェ変換; 屈折

The followings are the research results during the period of this project.1. It is necessary for this research project to synchronize the moving coordinate with the space fixed coordinate exactly. In order to do it, the accuracy of speed of the towing carriage in the small water tank and period of radiation motion must be high. By using the synchronized time, the relation, that indicates phase difference, between an incident wave and the ship motion has been able to be identified. With this developed system our experiments has been carried out efficiently.2. An unsteady wave field, which was generated by a ship with oscillating advanced velocity, was measured with the video system on the space fixed coordinate. Those data must be translated to the data on the moving coordinate system. This data transportation analysis method has been established.3. By using the measurement instrument, it turned out to be possible to measure the very concentrated wave, that is the impulsive wave.4. By using the system, the experimental method to obtain relative motion between wave surface and the ship body in regular and/or irregular waves was probed.5. The experimental and analyzed system to obtain the wave amplitude function of a ship by measuring the unsteady or steady wave fields on video tape has been established.

以下是本项目期间的研究成果。本研究项目需要实现运动坐标与空间固定坐标的精确同步。要做到这一点，拖车在小水箱中的速度精度和辐射运动周期必须很高。利用同步时间，可以识别入射波与船舶运动之间的相位差关系。利用所开发的系统，我们的实验得到了很好的进行。利用摄像系统在空间固定坐标系下测量了船舶以振荡前进速度产生的非定常波浪场。这些数据必须转换到移动坐标系上的数据。建立了这种数据传输分析方法。通过使用测量仪器，可以测量非常集中的波，即脉冲波。探索了利用该系统获得规则波和/或不规则波中波面与船体相对运动的实验方法。建立了通过测量录像带上的非定常波场和定常波场获得船舶波幅函数的实验和分析系统。

项目成果

H.KIHARA,Y.SHIRAKURA S.NAITO: "Nonlinear Approach to A Design of Above Water Bow Form" Proc.of KOJAM'96. (1996)

H.KIHARA,Y.SHIRAKURA S.NAITO：“水上弓形设计的非线性方法”Proc.of KOJAM96。

K.Takagi,T.Ohshima: "Experimental Study on Interaction between Solitary Wave and Floating Elastic Plate" Proceedings of the 3rd KOJAM symp.(1996)

K.Takagi，T.Ohshima：“孤立波与浮动弹性板相互作用的实验研究”第三届 KOJAM symp 论文集（1996）

S.NAITO,K.TOMITA,et al.: ""A new Configuration of Wave Tank and Control of Wave Generation and Absorption"" Journal of the Kansai Society of Naval Architects, Japan. Vol.226. (1996)

S.NAITO，K.TOMITA，等人：“一种新的造浪池结构和波浪产生和吸收的控制”，日本关西造船学会杂志。

内藤林,富田和雄 他: "新しい波浪水槽形状と造波消波制御" 関西造船協会誌. 226. (1996)

Hayashi Naito、Kazuo Tomita 等：“新型波浪池形状与造波和消波控制”关西造船协会杂志 226。（1996 年）

K.TAKAGI,T.OHSHIMA: ""Experimental Study on Interaction between Solitary Wave and Floating Elastic Plate"" Proc.of 3rd KOJAM Symposium. (1996)

K.TAKAGI,T.OHSHIMA：“孤立波与浮动弹性板相互作用的实验研究”，第三届 KOJAM 研讨会论文集。