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首页> 外文期刊>KSCE journal of civil engineering >Noise and Vibration Mitigation Performance of Damping Pad under CRTS-Ⅲ Ballastless Track in High Speed Rail Viaduct
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Noise and Vibration Mitigation Performance of Damping Pad under CRTS-Ⅲ Ballastless Track in High Speed Rail Viaduct

机译：高铁高架桥CRTS-Ⅲ型无Ball轨道下阻尼垫的降噪减振性能

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摘要

This study proposes a frequency domain vehicle-track coupling model for the CRTS (China railways track system)-III type damping track system based on the two-dimensional vehicle-track-viaduct coupling model, and utilizes dynamic compliance method to determine the dynamic compliance for the vehicle and track systems. The accelerations for the viaduct are hereinafter obtained and are compared between CRTS-III damping track system and conventional CRTS-III track system, and the structure-borne noises for near field and far field of the viaduct are assessed with finite element method (FEM). The acoustic contribution rates for the substructures of the viaduct to the near-field and far-field noises are analyzed. The results reveal that in comparison with the conventional CRTS-III system, the CRTS-III damping track system can mitigate the viaduct acceleration peak with 69.9%, and mitigate the average acceleration with 60.4%. The near field and far field noise measurement points are captured for the CRTS-III damping track system, the sound pressure levels decline by 8.15 dB and 8.36 dB, respectively. The acoustic contribution rates for the viaduct top plate reach 65.28% and 68.30%, respectively. The viaduct top plate thus becomes the major noise source and the damping track system can effectively mitigate the structure-borne noise of the viaduct.
机译：本研究基于二维车轨-高架桥耦合模型，提出了CRTS-III型阻尼轨道系统的频域车轨耦合模型，并利用动态柔度法确定了动态柔度。用于车辆和轨道系统。此后获得高架桥的加速度，并将其与CRTS-III阻尼轨道系统和常规CRTS-III轨道系统进行比较，并通过有限元方法（FEM）评估高架桥近场和远场的固体声。 。分析了高架桥子结构对近场和远场噪声的声学贡献率。结果表明，与常规CRTS-III系统相比，CRTS-III阻尼轨道系统可以将高架桥加速度峰值降低69.9％，将平均加速度降低60.4％。对于CRTS-III阻尼轨道系统，捕获了近场和远场噪声测量点，声压级分别下降了8.15 dB和8.36 dB。高架桥顶板的声学贡献率分别达到65.28％和68.30％。高架桥顶板因此成为主要的噪声源，并且阻尼轨道系统可以有效地减轻高架桥的结构噪声。

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