Characteristics of Rolling Noise Sources of Tram Resilient Wheels and Track

Noise emission from individual vehicle largely contributes to city pollution and has serious health impact. The standards towards vehicle manufactures consists in pass-by testing with specific acceleration conditions which are not representative of all real driving. For the 2015/996 EU directive, the vehicle source model is inspired of the preceding pass-by standard with derived data represented the propulsion and rolling noise sources. Anyhow, those sources are underestimated due to driving behavior, aged and modified vehicle, road surface, meteorological conditions... The true data collection of vehicle pass-by would be interesting. Moreover, some of the countries are reflecting on how to fight against those extremely noisy vehicle exceeding noise limit with efficient monitoring systems. This paper presents an innovative tool able to detect, identify and quantify the noise emission of individual pass-by vehicle in real life traffic. It is based on the combination of array and video processing. Compared to the state of the art and thanks to MEMs technology, the system is optimized and designed to quantify the individual noise vehicle emission regarding standard with controlled measurement and accurate processing. If the conditions are not respected to properly qualify the pass-by regarding the system limits, the data are ignored. It aims at constructing large and accurate database useful to determine average noise levels and/or acceptable noise limits per vehicle category.

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Investigations Concerning Tyre/Road Noise Sources and Possibilities of Noise Reduction

Proceedings of the Institution of Mechanical Engineers Part D Transport Engineering ◽

10.1243/pime_proc_1985_199_157_01 ◽

1985 ◽

Vol 199 (3) ◽

pp. 199-206 ◽

Cited By ~ 3

Author(s):

M Jennewein ◽

M Bergmann

Keyword(s):

Noise Reduction ◽

Broad Spectrum ◽

Road Noise ◽

Noise Sources ◽

Measuring Methods ◽

Rolling Noise

With the aid of several different measuring methods it is possible to obtain an idea of the numerous possible generating mechanisms for the rolling noise of tyres. The knowledge of these noise generating processes leads to a broad spectrum of possibilities for reducing tyre noise, with each of these possibilities effecting just a small amount of noise reduction.

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A Finite Element Approach to the Transient Dynamics of Rolling Tires with Emphasis on Rolling Noise Simulation4

Tire Science and Technology ◽

10.2346/1.2768975 ◽

2007 ◽

Vol 35 (3) ◽

pp. 165-182 ◽

Cited By ~ 12

Author(s):

Maik Brinkmeier ◽

Udo Nackenhorst ◽

Heiner Volk

Keyword(s):

Finite Element ◽

Traffic Noise ◽

Complex Eigenvalue ◽

Arbitrary Lagrangian Eulerian ◽

Finite Element Approach ◽

Road Systems ◽

Element Approach ◽

Road Surface Roughness ◽

Complex Eigenvalue Analysis ◽

Rolling Noise

Abstract The sound radiating from rolling tires is the most important source of traffic noise in urban regions. In this contribution a detailed finite element approach for the dynamics of tire/road systems is presented with emphasis on rolling noise prediction. The analysis is split into sequential steps, namely, the nonlinear analysis of the stationary rolling problem within an arbitrary Lagrangian Eulerian framework, and a subsequent analysis of the transient dynamic response due to the excitation caused by road surface roughness. Here, a modal superposition approach is employed using complex eigenvalue analysis. Finally, the sound radiation analysis of the rolling tire/road system is performed.

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