基于局域共振声子晶体结构的汽车空腔阻隔材料  

Cavity Filler with the Structure of Local Resonant Phononic Crystals for Vehicle Body

作　　者：张思文 庞剑 张军 马壮壮 蔡海波 令宇龙 

机构地区：[1]重庆长安汽车股份有限公司汽车工程研究总院,重庆401120 [2]汽车噪声振动和安全技术国家重点实验室,重庆401120

出　　处：《汽车工程》2015年第10期1179-1184,共6页Automotive Engineering

摘　　要：在汽车车身空腔中设置空腔阻隔材料是控制旁路噪声的一种有效手段。本文中基于局域共振声子晶体的带隙理论,提出了一种空腔阻隔材料的结构设计方案。通过仿真计算和测试分析,证实所设计的空腔阻隔材料在一定频率范围存在声波带隙并可通过修改结构参数来调节,以有效提高其隔声性能。所提出的方案为车身侧围空腔中特定频率或特定频率范围的旁路噪声提供了一种有效的控制方法。The use of sound insulation filler to fill the acoustic cavities in vehicle body is an effective means for bypass noise control.In this paper,a structural design scheme for cavity fillers is proposed based on the band gap theory of local resonant phononic crystals.The results of both simulation and tests demonstrate that there exist band gaps in the sound wave of the cavity fillers designed in certain frequency range,which can be adjusted by changing structural parameters to enhance their sound insulation performance.The scheme put forward provides an effective control method for the bypass noise of side panel cavities in certain frequency or frequency range.

关 键 词：汽车 NVH性能 空腔阻隔材料 局域共振 声子晶体 旁路噪声 

分 类 号：U465[一般工业技术—材料科学与工程] TB535[机械工程—车辆工程]