古筝弦-码结构的三维动力学分析与实验验证

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Abstract The Guzheng string-bridge structure is an important component of Guzheng vocal system, and also, the primary issue of sound mechanism research. The 3-D dynamic model of Guzheng string-bridge has been establish with the Guzheng Bridge be considered as rigid double code feet and the string vibration be considered as bounded string vibration. Then the change rule of normal faces of the two code feet in different plucking angles have been analyzed by using the Matlab numerical calculation. Finally, the calculated results have been verified using the experimental measurement. The results show that the 3-D dynamic model of Guzheng string-bridge is effectively and reliable. When plucking the string in 00, the minimum value of the dynamic force of left code foot is very closed to zero, which is easy to cause bridge hopping; When plucking the string in 900, the phase dynamic forces of two code feet are same, and the resultant force of two code feet is largest; When plucking the string in 450 and 1350, the bridge dynamic forces of two angles are dissymmetry, and the phase dynamic forces of two code feet are opposite in this two angles. The work of this paper optimizes the dynamic model of Guzheng string-bridge structure. And it summarized the change rule of normal faces of the two code feet in different plucking angles, and will provide more or less support and guidance for improvement of future Guzheng.

Key words： Guzheng string-bridge structure dynamics model plucking angles

Received: 14 December 2020 Published: 28 March 2022

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	Articles by authors
	DENG Xiaowei1
	YU Zhengyue1
	YAO Weiping1
	ZHOU Li2

Cite this article:

DENG Xiaowei1,YU Zhengyue1,YAO Weiping1, et al. 3D dynamic analysis and test verification of the string-bridge structure of a Guzheng[J]. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(6): 70-75.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2022/V41/I6/70

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