应用数值模型评估复合型材填充硬质泡沫的声学影响  

Evaluation of the Acoustic Performance of Composite Extruded Sections Filled with Hard Foams

作　　者：陈红伟 王奇 CHEN Hongwei;WANG Qi(BSWA Consulting Co.,Ltd.,Beijing 100029,China)

机构地区：[1]北京声望布莱纳咨询有限公司,北京100029

出　　处：《噪声与振动控制》2021年第5期255-259,共5页Noise and Vibration Control

摘　　要：车内噪声问题是机车设计中的一个关键因素,通常考虑使用声学处理的方式来增加关键部位的隔声性能。从设计成本考虑,增加的声学处理材料需要建立在确实能够增加结构声学性能的基础上。型材结构作为常用的机车车体结构,其隔声性能的好坏直接影响车内噪声水平。应用数值仿真方法研究中空型材增加硬质泡沫对整体结构声学特性的影响。基于模型从整体结构振动,辐射效率的角度分析在增加泡沫前后的变化,进而了解整个结构能量的传递过程,仿真分析与实际的测试结果保持一致。Interior noise is a key problem which needs to be considered in locomotive design.Generally,the acoustic treatment is used to improve the sound insulation performance of the key components.In terms of design cost,the additional acoustic treatment materials need to guarantee the fact that they can raise the acoustic performance of the structure.The sound insulation performance of profile structure,which is used as a common locomotive body structure,directly affects the noise level inside the locomotive.In this paper,numerical simulation method is applied to study the acoustic characteristics of hollow profile structure filled with hard foam.Vibration and radiation efficiency of the model before and after adding the hard foam are analyzed to understand energy transfer process in the structure.It is shown that the simulation result is consistent with the actual test result.

关 键 词：声学 振动速度 辐射效率 隔声量 

分 类 号：U270.1.6[机械工程—车辆工程]