- 著者
- 金子 淳一 細矢 直基 古屋 耕平
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- Dynamics & Design Conference 2010 (ISSN:24242993)
- 巻号頁・発行日
- pp._111-1_-_111-6_, 2010-09-14 (Released:2017-06-19)
- 被引用文献数
- 2 3
This paper discuses the way to reduce the noise and vibration of thin plate structures. This paper focuses on the musical saw, a kind of musical instrument. The musical saw is thin plate and it is need to bend the saw as S-curve, to play the instrument. Thin plate structures used for various products. In some case, curvature is laid on thin plate structures to enhance the rigidity. If musical saw and thin plate structures conditions are matched, it will be noise problem. Investigating that the relationship between the sound pressure, S-curve, boundary condition, and aspect ratio of the saw by experiment and FEA, it is discussed to apply the investigation result to the thin plate structures.
- 著者
- 谷田 涼 内野 敬太 松村 雄一
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- Dynamics & Design Conference 2010 (ISSN:24242993)
- 巻号頁・発行日
- pp._740-1_-_740-6_, 2010-09-14 (Released:2017-06-19)
This paper clarified the excitation mechanism of picking the strings of a guitar. The picking excites forced vibration and free vibration of the strings by giving the strings impact force, friction force and initial condition. At first, separate influence of these force and initial condition was experimentally examined. Then, generation mechanism of transient responses of the strings was examined for ordinary picking technique, by the viewpoint of the influence of impact force, friction force and initial condition.
- 著者
- 林 裕介 渡辺 昌宏 原 謙介
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- Dynamics & Design Conference 2010 (ISSN:24242993)
- 巻号頁・発行日
- pp._260-1_-_260-6_, 2010-09-14 (Released:2017-06-19)
This paper deals with theoretical stability analysis of an active feedback control of web flutter which occurs to the web with both ends fixed and tensioned. In this paper, a non-contact active feedback control method of web flutter by using movable plates set at inlet or outlet of the passage are developed and its analytical model is constructed. The equations of motion of the flexible sheet coupled with the fluid flow controlled by the movable plates are obtained. The characteristic equation of the system is derived as a function of the flow velocity in the narrow gap. As a result, it is shown that the web flutter occurs to the web with increasing the flow velocity, and is effectively suppressed by the proposed non-contact flow control devices and active feedback control method. Furthermore, calculation results are verified by the experiments.