A combined iterative complex eigenvalue method and finite element-boundary element method for acoustic analysis of the railway steel bridge deck damped with constrained layer damping

IF 3.5 3区材料科学 Q1 ENGINEERING, MECHANICAL

Journal of Sandwich Structures & Materials Pub Date : 2023-08-21 DOI:10.1177/10996362231197681

Xihao Jiang, Haoqing Li, Xiaozhen Li, Lin Liang

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引用次数: 0

Abstract

This paper presents a combined method to predict structure-borne noise from the railway steel bridge deck damped with constrained layer damping (CLD), in which the frequency-dependent properties of the viscoelastic material are accurately considered through the iterative complex eigenvalue method (ICEM). Then, a 1:4 steel bridge deck model is designed and manufactured, and a series of hammer tests of the CLD-damped steel bridge deck are carried out in a semi-anechoic chamber to verify the proposed method. Then, the noise reduction effect of CLD is discussed in detail. It shows that the overall SPLs at the near field point S-3 and the far field point S-8 are reduced by 7.5 dB and 11.1 dB, respectively, and the noise attenuation rate along with distance is also improved significantly after damped with CLD. Finally, the influences of the key design parameters of CLD on noise reduction are quantitatively analyzed, so as to provide reference for the research and application of CLD in railway bridge engineering.

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结合迭代复特征值法和有限元-边界元法对具有约束层阻尼的铁路钢桥面进行声学分析

本文通过迭代复特征值法(ICEM)准确地考虑了粘弹性材料的频率相关特性，提出了一种结合约束层阻尼(CLD)的铁路钢桥面结构噪声预测方法。然后，设计并制作了1:4的钢桥面模型，并在半消声室中对cld阻尼钢桥面进行了一系列锤击试验，验证了所提出的方法。然后，详细讨论了CLD的降噪效果。结果表明，采用CLD阻尼后，近场点S-3和远场点S-8的总声压差分别降低了7.5 dB和11.1 dB，随距离的噪声衰减率也显著提高。最后，定量分析了CLD关键设计参数对降噪的影响，为CLD在铁路桥梁工程中的研究和应用提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sandwich Structures & Materials 工程技术-材料科学：表征与测试

CiteScore

9.60

自引率

2.60%

发文量

审稿时长

7 months

期刊介绍： The Journal of Sandwich Structures and Materials is an international peer reviewed journal that provides a means of communication to fellow engineers and scientists by providing an archival record of developments in the science, technology, and professional practices of sandwich construction throughout the world. This journal is a member of the Committee on Publication Ethics (COPE).