噪声与振动控制2017，Vol.37Issue(2)：121-126,6.DOI:10.3969/j.issn.1006-1355.2017.02.025
温度对敷有阻尼层的铝型材声学性能的影响
Influence of Temperature on Acoustic Characteristics of Extruded Aluminum with Damping Layers
摘要
Abstract
In order to study the influence of temperature on the acoustic performance of extruded aluminum structures with viscoelastic damping layers of the car-bodies of high-speed trains, the models for sound transmission loss prediction and sound radiation characteristics prediction are established respectively. The acoustic performances of the models are analyzed using the hybrid FE-SEA within the low and medium frequency range of 100 Hz-500 Hz and using the SEA in the high frequency range above 630 Hz respectively. Based on the measurement data, the influence of temperature-varying characteristics of the viscoelastic material on its Young's modulus and damping loss factor is analyzed. The sound transmission loss and sound radiation characteristics of the extruded aluminum under different temperatures are calculated using the numerical models. The influence of the temperature on the acoustic performance of the extruded aluminum with damping layers is investigated. The results show that the influence of the temperature is focused on the resonance frequency region and the high frequency region above 1600 Hz. The viscoelastic damping layer has a great noise control effect in the temperature range of 10℃-50℃, but will lose its effect for noise reduction below 10℃.关键词
声学/阻尼层/温度影响/隔声量/振动声辐射Key words
acoustics/damping layer/influence of temperature/sound transmission loss/sound radiation characteristics分类
通用工业技术引用本文复制引用
陈沛,沈火明,张捷,肖新标..温度对敷有阻尼层的铝型材声学性能的影响[J].噪声与振动控制,2017,37(2):121-126,6.基金项目
国家自然科学基金资助项目(U1434201、51475390) （U1434201、51475390）
国家重点研发计划课题资助项目(2016YFB1200503、2016YFB1200506) （2016YFB1200503、2016YFB1200506）
牵引动力国家重点实验室自主课题资助项目(2015TPL_T08) （2015TPL_T08）
