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

Violin Bridge Mobility Analysis under In-Plane Excitation

1,2
,
3,* , 1
 and
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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Abstract

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 3.0).

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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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