基于声学黑洞波动控制技术的槽型轨动力吸振器减振降噪特性研究

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Abstract The environmental vibration noise problem caused by rail transportation continues to increase, and even though there are a variety of vibration and noise reduction measures with good control effects, further enhancements are still expected to be made. In this study, a new type of channel rail dynamic vibration absorber is proposed, which combines acoustic black hole technology with the principle of dynamic vibration absorber. The objective of this absorber design is to ensure the strength and stiffness of the main structure while using additional acoustic black hole damping oscillators as energy absorbing units to transfer, absorb and dissipate the vibration energy of the main structure. In order to study the effect of acoustic black hole dynamic vibration absorber on the vibration characteristics and acoustic radiation characteristics of the channel rail, the displacement conductance and vibration attenuation rate of the channel rail under different types of dynamic vibration absorbers were evaluated using simulation analysis; the noise reduction effect of the acoustic black hole dynamic vibration absorber was calculated and analyzed using a rolling noise prediction model and the influence law of its parameters on the vibration noise of the wheel track was investigated. The results show that: the first-order pinned-pinned in the 800-1000Hz frequency range of the channel rail has a significant vibration response without measures, and the vibration attenuation rate is only 0.68dB/m. After the installation of the acoustic black hole dynamic vibration absorber, the vibration attenuation rate of the rail structure rises to 1.80dB/m, and the improvement rate can reach 265%.

Key words： acoustic black hole dynamic vibration absorber vibration and noise control finite element analysis boundary element analysis

Received: 13 June 2023 Published: 28 March 2024

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	Articles by authors
	SHI Duojia1
	ZHAO Caiyou1
	YI Qiang2
	ZHANG Mingkai1
	GAO Xin1
	WANG Ping1

Cite this article:

SHI Duojia1,ZHAO Caiyou1,YI Qiang2, et al. Assessment of the vibration and noise reduction performances of a channel rail dynamic vibration absorber utilizing acoustic black hole technology[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(6): 206-215.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I6/206

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