摘要
针对低频噪声波长长、穿透性强、衰减慢等问题,设计了一种具有锥形空腔的压电声学超材料(PAM)结构,采用仿真和实验测试的方法研究了其对声波的调控性能。首先,采用COMSOL软件建立了具有锥形空腔PAM的有限元模型;然后,研究了分流电路中电感与负电容大小对PAM隔声特性的影响,分析了PAM夹芯层有无锥形空腔、锥形空腔尺寸、橡胶板厚度对隔声性能的影响;最后,制备了具有锥形空腔的PAM试件,并基于四传声器法搭建了隔声测试平台,对具有锥形空腔的PAM隔声性能进行了实验测试,结合实验结果对仿真结果进行了验证。研究结果表明:随着等效电感值增大,隔声峰值频率向低频移动;引入负电容后可提高PAM在高频处的隔声性能。同时,随着负电容值增大,隔声峰值增加,隔声谷值减小。上述研究结果可为PAM在噪声控制方面的应用提供理论基础。
Aiming at the problems of low-frequency noise,such as its long wavelength,strong penetrating ability,and slow attenuation,a piezoelectric acoustic metamaterial(PAM)structure featuring conical cavities was designed,and its ability to modulate sound waves was thoroughly investigated by combining finite element analysis with experimental verification.Firstly,a finite element model of PAM with conical cavities was established based on COMSOL software.Then,the effects of the inductance and negative capacitance in the shunt circuit on the sound insulation characteristics of the PAM were explored,and the influence of the presence or absence of a conical cavity in the PAM core layer,the size of the conical cavity,and the thickness of the rubber plate on the sound insulation performance was analyzed.Finally,PAM specimens featuring conical cavities were prepared and fabricated,and a comprehensive sound insulation testing platform was constructed based on four-transducer method and principle.The sound insulation performance of the PAM with conical cavities was thoroughly tested,and the simulation results were meticulously validated in conjunction with the empirical test outcomes.The research results indicate that as the equivalent inductance value increases,the sound insulation peak frequency shifts towards lower frequencies.Introducing negative capacitance can improve the sound insulation performance of the PAM at high frequencies,and as the negative capacitance value increases,the sound insulation peak increases and the sound insulation valley decreases.The aforementioned research can offer a comprehensive theoretical foundation for the application of PAM in the field of noise control in the future.
作者
赵跃超
马张飞
韩康
杨毅
ZHAO Yuechao;MA Zhangfei;HAN Kang;YANG Yi(School of Mechanical Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)
出处
《机电工程》
北大核心
2025年第8期1594-1605,共12页
Journal of Mechanical & Electrical Engineering
基金
黑龙江省省属本科高校基本科研业务费项目(2023-KYYWF-0541)
黑龙江科技大学高层次人才科研启动基金资助项目(HKD202115)。
关键词
机械工程材料
压电声学超材料
分流电路参数
结构参数
隔声性能
夹层板
锥形空腔
mechanical engineering materials
piezoelectric acoustic metamaterials(PAM)
shunting circuit parameters
structural parameters
sound insulation characteristics
sandwich plates
conical cavities
