Dynamic response evaluation of tall noise barrier on high speed railway structures

Tokunaga, Masashi; Sogabe, Masamichi; Santo, Tetsuo; Ono, Kiyoshi

doi:10.1016/j.jsv.2015.12.015

Cited by 43 publications

(11 citation statements)

References 10 publications

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Section: Measurement Datasupporting

confidence: 90%

“…It can be observed from Figure 8 that the peak wind pressure was approximately proportional to the square of the running speed of the train. Similar results can be found in previous research regarding scale model studies, numerical investigations, and full-scale tests [23][24][25][26]. Since the peak wind pressure at point 9 was the maximum, the measured data of point 9 was chosen to analyze the relationship between the peak wind pressure and the train speed, as illustrated in Figure 8.…”

Section: Measurement Datamentioning

confidence: 55%

“…By considering the effect of train types, train speeds, and barrier types, a systematical measurement about fluctuating wind pressures on barriers was conducted at the Nuremberg-Ingolstadt high-speed railway line in Germany [23]. Tokunaga et al [24] obtained the fluctuating wind pressures on a barrier, as well as the dynamic responses of the barrier, by field measurement, and proposed two design methods to evaluate the dynamic responses of the barrier. Xiong et al [25] conducted a full field test to obtain the fluctuating wind pressures on a 2.15 m high bridge noise barrier induced by a CRH380A EMU high-speed train at the speed of 250 km/h to 380 km/h.…”

Section: Introductionmentioning

confidence: 99%

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Wind Load Characteristics of Wind Barriers Induced by High-Speed Trains Based on Field Measurements

Zou

et al. 2019

Applied Sciences

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This paper focuses on field measurements and analyses of train-generated wind loads on wind barriers (3.0 m height and porosity 0%) with respect to different running speeds of the CRH380A EMU vehicle. Multi-resolution analysis was conducted to identify the pressure distribution in different frequency bands. Results showed that the wind pressure on the wind barrier caused by train-induced wind had two significant impacts with opposite directions, which were the “head wave” and “tail wave”. The peak wind pressure on the wind barrier was approximately proportional to the square of the speed of the train, and the peak wind pressure decreased rapidly along the wind barrier height from the bottom of the wind barrier. The maximum wind pressure occurred at the rail surface height. Furthermore, results of the multi-resolution analysis illustrated that the energy of the frequency band from 0 to 2.44 Hz accounted for 94% of the total energy. This indicated that the low-frequency range component of the wind pressure dominated the design of the wind barrier. The frequency of pulse excitation of train-induced wind loads may overlap with the natural frequency of barriers, and may lead to fatigue failure due to cyclic loads generated by the repeated passage of high-speed trains. In addition, the speed of the train had a negligible effect on the energy distribution of the wind pressure in the frequency domain, while the extreme pressure increased slightly with the increase of the speed of the train.

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Section: Measurement Datasupporting

confidence: 90%

Section: Measurement Datamentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Wind Load Characteristics of Wind Barriers Induced by High-Speed Trains Based on Field Measurements

Zou

et al. 2019

Applied Sciences

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“…Accordingly, studies for the evaluation and reduction of train noise have been conducted continuously. 2–11…”

Section: Introductionmentioning

confidence: 99%

Improving the design of the traction motor of trains to reduce the aerodynamic noise

Kim¹,

Ki²,

Byun³

2019

Proceedings of the Institution of Mechanical Engineers, Part F:

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The traction motor of trains, which is the core equipment in the railway industry, is a major noise source. As the protection of the environment becomes increasingly more important, the regulations regarding acceptable train noise are becoming stricter. Therefore, more studies on the traction motor of trains are required to find a method to reduce the noise. The existing studies on this topic are insufficient because of the high cost of producing prototypes and the absence of an aerodynamic noise analysis scheme with proven reliability. In this study, the noise performance of the traction motor of trains was evaluated using the numerical analysis of the lattice Boltzmann method, and its effect on the design variables of the traction motor was analyzed. To conduct this study, a reliable numerical analysis scheme was established by evaluating the performance of the base model through an experiment and numerical analysis and comparing the two results. In addition, seven major noise sources, including the size of the cooling fan, blade shape, number of blades, slot wedge shape, and clamp shape, were selected by analyzing the result of the numerical analysis of the base model. The effect of each design variable on the performance of the base model was analyzed by assessing the performance of cases that reflect the design modification of the chosen design variables. Based on the result, a complementary design model was designed to reduce noise, and the performance of this model was evaluated using numerical analysis and compared with that of the base model. From the results, it was confirmed that the newly created model produces much lower noise than the base model.

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“…Aerodynamic effects increase approximately proportionally with air speed squared, consequently at higher speeds aerodynamic effects will be significantly greater than for trains travelling at lower speeds. In recent years there have been a number of failures of trackside infrastructure, namely acoustic barriers in Germany, which have been exacerbated by aerodynamic effects [8,4,14].…”

mentioning

confidence: 99%

Aerodynamic forces on railway acoustic barriers

Soper

Gillmeier

Baker

et al. 2019

Journal of Wind Engineering and Industrial Aerodynamics

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Dynamic response evaluation of tall noise barrier on high speed railway structures

Cited by 43 publications

References 10 publications

Wind Load Characteristics of Wind Barriers Induced by High-Speed Trains Based on Field Measurements

Wind Load Characteristics of Wind Barriers Induced by High-Speed Trains Based on Field Measurements

Improving the design of the traction motor of trains to reduce the aerodynamic noise

Aerodynamic forces on railway acoustic barriers

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