Characteristics of Vibration and Sound Radiation of Metro Resilient Wheel

Abstract

Resilient wheels are extensively used in urban rail transit, especially for tramway systems, owing to its advantages in noise reduction. A new type of resilient wheel for a metro is designed, and its characteristics of vibration and sound radiation, including the rolling noise of a resilient single wheel coupled with a track, are studied in this paper. A two-step research is presented. Firstly, laboratory experiments were conducted to obtain the vibration response of the designed resilient wheel under the radial excitation on its tread. Secondly, the rolling noise model of the resilient wheel coupled with a slab track used in a metro line is developed. The wheel model is based on the 3D finite element and boundary element methods and verified by using the experimental results obtained from the laboratory. The track vibration model is based on the wavenumber finite element method, and the track sound radiation is calculated by using an efficient frequency-domain Rayleigh method. The interaction of the resilient wheel and the slab track is analyzed considering the measured wheel/rail roughness of the metro. The contribution of the resilient wheel to the reduction of wheel/rail system noise is analyzed. The results show that the resilient wheel can effectively reduce the wheel/rail rolling noise by approximately 2 dB(A) to 3 dB(A), mainly because the radiated noise by the rail is reduced. In addition, the elastic modulus of the rubber has an important influence on the noise reduction of resilient wheels. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

An investigation into the effect of resilient wheel stiffness on the dynamic behaviour of a metro vehicle running along a tangent track

“…The vehicle speed is 80 km/h. The rubber of the resilient wheel is modelled as spring-damper unit, the global stiffness and damping coefficient of the rubber layer are given in Table 3, which were measured in tests (Zhou and Han, 2019).…”

“…Much work has been conducted on the effectiveness of resilient wheels on sound radiation. Following the modelling approach used in the wheel/rail rolling noise software TWINS (Thompson et al, 1996a; 1996b), Bouvet et al (2000), Jones and Thompson (2000), Van Haaren (1997) and Zhou and Han (2019) have established prediction models to calculate vibration and acoustic radiation of resilient wheels. Based on the simulation models, they have also tried to optimise the key structural and material parameters of resilient wheels.…”

Analysis of constructive solutions of resilient wheels of light railway vehicles: Directions of development and use from the view of vibroacoustic performance

“…Potražnja za železničkim točkovima sa niskim nivoom buke raste poslednjih godina, zajedno sa novom ekološkom politikom koja dovodi do strogih ograničenja emisija buke [14]. Elastični točkovi se u velikoj meri koriste u gradskom železničkom tranzitu, posebno za tramvajske sisteme, zbog svojih prednosti u smanjenju buke [15]. Elastični točkovi su točkovi u kojima je gazeći sloj konstrukciono izolovan od glavčine točka, uglavnom elastomernim materijalom [16].…”

“…Autor Zhou sa saradnicima [15] analizirao je doprinos elastičnog točka smanjenju buke sistema točak/šina. Rezultati su pokazali da elastični točak može efikasno da smanji buku kotrljanja za približno 2 dB do 3 dB, uglavnom zato što je smanjena buka koju emituje šina.…”

Impact Noise Properties of Resilient Wheels Using an implicit-explicit dynamics model

“…Studies by Thompson [18], Bouvet et al [21], Van Haaren [22], Cigada et al [23], and Zhou et al [24] indicate that the resilient wheel can effectively reduce the wheel-rail noise based on the following principles:…”