上海交通大学学报

上海交通大学学报（自然版） ›› 2016, Vol. 50 ›› Issue (02): 300-305.

• 数理科学和化学 • 上一篇    下一篇

传统古筝的振动声学特性仿真分析

邓小伟1，余征跃1，姚卫平1，陈民杰2   

  1. (1. 上海交通大学 工程力学系， 上海 200240； 2. 上海民族乐器一厂， 上海 201101)
  • 收稿日期:2015-03-14 出版日期:2016-02-29 发布日期:2016-02-29
  • 基金资助:
    国家自然科学基金项目（11132007，11272203）资助

Simulation Analysis of VibroAcoustic Characteristics of Traditional Guzheng

DENG Xiaowei1，YU Zhengyue1，YAO Weiping1，CHEN Minjie2   

  1. (1． Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200240, China； 2． Shanghai National Musical Instrument Factory, Shanghai 201101, China)
  • Received:2015-03-14 Online:2016-02-29 Published:2016-02-29

摘要： 摘要： 基于振动声学原理提出了传统古筝的简化分析模型；建立了古筝结构的三维有限元模型，以琴弦及琴码对面板的作用力作为振动条件进行了振动频响分析，并以振动频响仿真结果作为声学边界条件建立了古筝的声学有限元模型以仿真其声学特性.结果表明，古筝结构振动的有限元仿真结果与其实验结果基本一致，所得古筝辐射声压频响曲线的主要峰值频率与结构有限元计算的结果基本一致.其中，声压频响在350~550 Hz以内比350 Hz之前的声辐射效率更高；古筝向上的振动声辐射量高于向下的．

关键词: 传统古筝, 振动声学, 有限元模型, 结构声学设计

Abstract: Abstract： Based on the vibroacoustic principle, the simplified model of traditional Guzheng was proposed. A 3D finite element model (FEM) of the Guzheng structure was established to analyze the vibration frequency response with the force of the strings and bridge acting on the panel as the vibration condition. The acoustic FEM and its analysis were established with vibration frequency response as the acoustic boundary conditions, and the frequency response characteristics of radiated sound pressure were obtained. The results show that the simulation results of Guzheng vibration are consistent with the experiment while the peak frequency of the radiated sound pressure of Guzheng is consistent with the simulation results. The acoustic radiation efficiency between 350 and 550 Hz is higher than that before 350 Hz. The upward acoustic radiation of Guzheng vibration is stronger than the downward one.

Key words: Key words： traditional Guzheng, vibroacoustic, finite element model (FEM), structure design

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