【摘要】 本文研究了螺旋声学黑洞（SABH）对通风管道的振动抑制特性以及减振机理，与传统减振手段相比，SABH具有轻量化、易安装、低频宽带吸振特性等方面的优势。有限元仿真结果表明，SABH有效抑制了通风管道的振动。与未布置SABH的原始管道相比，布置SABH后的管道监测点前三阶加速度级共振峰降低10 dB以上，监测面的振动速度总级降低了3.73 dB。振动实验结果表明，布置SABH后的管道测点低频段加速度级共振峰基本降低10 dB以上，高频效果更加显著。研究表明，SABH对通风管道减振具有优异的低频宽带减振性能，对管道结构波能量有良好的汇聚与耗散作用。更多还原

【Abstract】 This paper investigates the vibration reduction characteristics of spiral acoustic black holes(SABH) on ventilation ducts and the damping mechanism. Compared with conventional vibration damping methodologies, SABH possesses distinct advantages, including its lightweight nature, ease of installation, and the capacity for low-frequency broadband vibration absorption. The finite element simulation results demonstrate the efficacy of SABH in suppressing the vibration of ventilation ducts. Compared with the original duct without SABH, the resonance peak of the first three orders of acceleration levels at the monitoring point are reduced by more than 10 dB after installing SABH. Additionally, the total level of vibration velocity at the monitoring surface decreases by 3.73 dB. The experimental results of the vibration analysis indicate that after the implementation of SABH, the resonance peaks of the acceleration level at the measurement point in the low-frequency band are reduced by more than 10 dB. Furthermore, the high-frequency effects are found to be more pronounced. The study demonstrates that SABH exhibits superior lowfrequency broadband vibration damping performance for ventilation ducts, and displays effective convergence and dissipation of wave energy within the pipe structure.更多还原