摘要
为了预测和控制快速和准高速线路上车轮扁疤激起的轮轨冲击噪声,应用车辆-轨道耦合动力学理论和声辐射理论,建立了基于车辆-轨道相互作用的轮轨冲击噪声预测模型,编制轮轨噪声仿真程序计算分析了车轮扁疤激扰下轮轨冲击噪声的特性。结果表明:(1)车轮扁疤是造成轮轨冲击噪声的重要源泉;(2)车轮扁疤引起的冲击噪声主要集中在250 Hz以上频段;(3)车轮扁疤引起的轮轨冲击噪声跟扁疤长度、扁疤个数以及列车运行速度有很大的关系;(4)车轮新扁疤比旧扁疤激起的轮轨冲击噪声大2 dB(A)～3 dB(A)。
In order to predict and control wheel/rail impact noise due to wheel flats in fast speed and semi-high speed railway, a model to simulate wheel/rail impact noise was set up based on the vehicle-track coupled dynamics theory and the sound radiation theory. The acoustic performances of wheel/rail impact noise due to railway wheel flats were studied with wheel/rail noise simulation program. The results demonstrate that railway wheel flats are the important sources of wheel/rail impact noise, which mainly concentrates in the frequency band of over 250Hz. Impact noise due to wheel flats is related to the length and quantity of wheel flats and the train speed. The differences between impact noises due to new flats and old flats are 2 dB(A)-3 dB(A).
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第8期46-49,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(50521503)
四川省科技基金项目(07ZQ026-119)
四川省"天府英才"工程资助
关键词
车辆-轨道耦合动力学
车轮扁疤
轮轨噪声
冲击噪声
vehicle-track coupled dynamics
railway wheel flats
wheel/rail noise
impact noise
