窗框结构对高速列车车窗隔声性能影响分析

Analysis on the Influence of Window Frame on the Sound Insulation Performance of High-Speed Train Windows

为探究窗框结构和材料对高速列车车窗隔声性能带来的影响,基于有限元-统计能量(FE-SEA)混合法,建立了双板空腔隔声量预测模型,并在此基础模型上添加窗框结构,接着通过锤击试验得到了不同窗框材料的阻尼损失因子。基于此模型,分析了在100~3150 Hz频段内有无窗框两种情况和不同窗框材料对高速列车车窗隔声性能的影响。研究结果表明:相较于无窗框的车窗结构,加装铝合金窗框后,车窗整体隔声量提升2.1 dB;并且当窗框材料为Mn-Cu阻尼合金时,车窗整体隔声量提升1.9 dB。本研究能为高速列车车窗结构与窗框材料优化设计提供参考。

In order to investigate the effect of window frame structure and material on the sound insulation performance of high-speed train windows,on the basis of the hybrid finite element-statistical energy(FE-SEA)method,a prediction model for sound transmission loss(STL)of two-plate cavity structure is built,and the window frame structure is added to the model.The damping loss factors of different window frame materials are obtained through the field hammer percussion test.Using the FE-SEA model,the influence of sound insulation performance of high-speed train windows with or without window frame structure and different window frame materials in 100~3150 Hz frequency band are analyzed.The results show that compared with the window structure without window frame,the overall sound insulation of the window increases by 2.1 dB after the aluminum alloy window frame is installed;when the window frame material is Mn-Cu damping alloy,the overall sound insulation of the window increases by 1.9 dB.The research provides reference for the optimization design of window structure and frame material of high-speed trains.