Violin Bridge Mobility Analysis under In-Plane Excitation

Sensors

Cheng-Zhong Zhang¹  Guang-Ming Zhang²  Bang-Yan Ye¹ 

[1] School of Mechanical and Automotive Engineering, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China; E-Mails:;General Engineering Research Institute, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK

关键词: violin bridge;    frequency response;    contact stiffness;    dynamic contact vibration;    dynamometer;   

DOI  :  10.3390/s131115290

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.