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Updated: Jul 1, 2025
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Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
Published on: April 13, 2016
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Acoustic performance evaluation of railway boundary walls using a computational fluid dynamics-based simulation
Boddu Sudhir Kumar1,2, Venkaiah Chowdary3
1Department of Civil Engineering, National Institute of Technology, Warangal, 506004, Telangana, India. sudhir23@student.nitw.ac.in.
Summary
This study evaluated railway noise barriers, finding T-shaped barriers up to 6m tall with soft surfaces significantly reduce noise. Improved barrier design can mitigate noise pollution for trackside residents.
Area of Science:
- Acoustics
- Environmental Engineering
- Urban Planning
Background:
- Railway noise is a growing concern for residents near tracks due to increased train traffic.
- Existing railway boundary walls serve dual purposes: land encroachment prevention and track safety.
- Passive noise reduction strategies, like noise barriers, are crucial for mitigating railway noise pollution.
Purpose of the Study:
- To assess the noise reduction effectiveness of existing railway boundary walls.
- To propose and simulate improved noise barrier designs using computational fluid dynamics (CFD).
- To identify optimal barrier geometry, shape, and materials for maximum noise attenuation.
Main Methods:
- Field measurements of railway noise spectra were taken at various locations relative to a 2.75m high rectangular barrier.
- Computational fluid dynamics (CFD) simulations were used to model different noise barrier configurations.
- Noise attenuation was quantified using insertion loss measurements.
Main Results:
- A 2.75m high rectangular barrier provided an insertion loss of 5.2 dBA.
- Simulations showed a positive correlation between barrier height and noise reduction, with a 6m barrier achieving 17 dBA.
- A 6m high T-shaped barrier with a 2m projection yielded the highest insertion loss of 22 dBA.
Conclusions:
- Barrier height and T-shaped geometry significantly enhance noise reduction effectiveness.
- Utilizing soft surface materials on barriers aids in sound wave reflection and absorption.
- Optimized noise barrier design is essential for urban planners and policymakers to protect residential areas from railway noise.
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