Reducing Noise and Vibration by using Some Items Derived from Violin Structure

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420197
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Kanagawa University
• Principal Investigator: YAMAZAKI TORU 神奈川大学, 工学部, 教授 (70272416)
• Co-Investigator(Kenkyū-buntansha): ITOH Yoshiaki 神奈川県産業技術センター, 機械・材料技術部, 研究員 (60426343)
• Co-Investigator(Renkei-kenkyūsha): NAKAMURA Hiroki 神奈川大学, 工学部, 助教 (50710141)
• Research Collaborator: IMAZU Taku 神奈川大学, 大学院工学研究科, 大学院生 ; SATOH Ken 神奈川大学, 大学院工学研究科, 大学院生 ; CHIDA Shohei 神奈川大学, 大学院工学研究科, 大学院生
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 楽器 / 振動 / 衝突 / 非線形

Outline of Final Research Achievements

Vibration propagation characteristics of the violin structure were analyzed by statistical energy analysis (SEA). As a result, it has been found the effect of the one-way vibration propagation through the bridge, and of vibration promotion and suppression by the sound post. The mechanism of vibration propagation through the bridge has been deduced by the discussion using the simple aluminum blocks which are attached by the strings. And then the bridge structure has been applied to realize the unidirectional vibration propagation on the real mechanical products. With respect to the sound post structure the commercial damper which is independent of the piston velocity was focused and the elucidation of the vibration reduction mechanism of the damper has been carried out.

Free Research Field

振動