摘要
在声波探测领域,放大声压具有重要意义。为了放大声压,设计喇叭状结构和抛物面结构模型,使用基于COMSOL Multiphysics软件的有限元分析法建立两种结构的声压放大模型。首先,计算两种结构对声压的增益倍数。仿真结果表明,喇叭状结构能够对声压实现最大20倍的放大,抛物面结构能够对声压实现最大30倍的放大。其次,研究不同结构的尺寸对声压的放大效果。结果表明,喇叭状结构尺寸与波长相当时的放大效果最显著,抛物面结构开口直径在几个特定数值处的放大效果最显著。最后,对声波造成的膜振动幅度进行仿真。结果表明,喇叭状结构使振膜振动幅度提高2.7~6倍,抛物面结构使振膜的振动幅度提高2~3.3倍。
In the field of acoustic detection,it is of great significance to amplify the sound pressure.In order to amplify the sound pressure,the trumpet structure and paraboloid structure models are designed,and the sound pressure amplification models of the two structures are established by using the finite element analysis method based on COMSOL Multiphysics software.Firstly,the gain multiples of two structures on sound pressure are calculated.The simulation results show that the horn structure can amplify the sound pressure up to 20 times and the paraboloid structure can amplify the sound pressure up to 30 times.Secondly,the amplification effect of different structure sizes on sound pressure is studied.The results show that the amplification effect is the most significant when the size of trumpet-shaped structure is equivalent to the wavelength,and the amplification effect is the most significant when the opening diameter of parabolic structure is at several specific values.Finally,the amplitude of membrane vibration caused by sound wave is simulated.The results show that the horn structure increases the vibration amplitude of the diaphragm by 2.7~6 times,and the parabolic structure increases the vibration amplitude of the diaphragm by 2~3.3 times.
作者
潘靖
张军
梁姗姗
PAN Jing;ZHANG Jun;LIANG Shanshan(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;School of Artificial Intelligence,Guilin University of Electronic Technology,Guilin 541004,China;Shenzhen National Institute of High Performance Medical Devices Co.,Ltd.,Shenzhen 518126,China)
出处
《电声技术》
2024年第3期60-65,共6页
Audio Engineering
基金
国家自然科学基金(61975246)
广西自然科学基金(2022GXNSFDA080007)
深圳市自然科学基金(JCYJ20220818103212026)
深圳市科技技术攻关重点项目(JSGG20220831110400001)。
关键词
声压放大结构
有限元法
COMSOL
膜片振动
sound pressure amplification structure
finite element method
COMSOL
diaphragm vibration
