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Sensors 2013, 13(11), 15290-15306; doi:10.3390/s131115290

Violin Bridge Mobility Analysis under In-Plane Excitation

3,* , 1
1 School of Mechanical and Automotive Engineering, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China 2 School of Software Engineering, South China Normal University, Nanhai Campus, Foshan, Guangdong 528225, China 3 General Engineering Research Institute, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
* Author to whom correspondence should be addressed.
Received: 19 September 2013 / Revised: 28 October 2013 / Accepted: 30 October 2013 / Published: 8 November 2013
(This article belongs to the Special Issue Sensors for Cultural Heritage Diagnostics)
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The vibration of a violin bridge is a dynamic contact vibration with two interfaces: strings-bridge, and bridge feet-top plate. In this paper, the mobility of an isolated bridge under in-plane excitation is explored using finite element modeling based on the contact vibration model. Numerical results show that the dynamic contact stiffness in the two contact interfaces has a great impact on the bridge mobility. A main resonance peak is observed in the frequency range of 2–3 kHz in the frequency response of the isolated bridge when the contact stiffness is smaller than a critical threshold. The main resonance peak frequency is affected by the contact stiffness as well. In order to verify the numerical findings, a novel experimental system is then designed on the basis of a piezoelectric dynamometer for bridge mobility analysis. Experimental results confirm the impact of the dynamic contact stiffness on the bridge mobility.
Keywords: violin bridge; frequency response; contact stiffness; dynamic contact vibration; dynamometer violin bridge; frequency response; contact stiffness; dynamic contact vibration; dynamometer
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zhang, C.-Z.; Zhang, G.-M.; Ye, B.-Y.; Liang, L.-D. Violin Bridge Mobility Analysis under In-Plane Excitation. Sensors 2013, 13, 15290-15306.

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