Vibration and passenger comfort: Can data from subjects be used to predict passenger comfort?

Oborne, David J.

doi:10.1016/0003-6870(78)90006-6

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…Perceptions of ride quality and comfort are related but distinct, since comfort is also influenced by other factors such as odours, noise, temperature, lighting, etc. Oborne [39] established some ride quality comfort thresholds, but also without financial valuations. Comfort can be improved by reducing train speed and thus vibration levels [40], but this would also increase travel and exposure time and is of questionable value.…”

Section: Values Of Vibration Ride Quality and Comfortmentioning

confidence: 99%

Noise reduction for ballasted track: A comparative socio-economic assessment

Armstrong¹,

Ortega²,

Blainey³

et al. 2019

Int. J. TDI

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Transport infrastructure produces many externalities. Increased accessibility and the resultant economic development are among the most notable positive ones. Accidents, air and noise pollution and other environmental issues, such as impacts on biodiversity, landscape and townscape, are the most important negative ones. In the case of railway infrastructure, noise impacts have a key effect on net social benefit. Noise reduction is crucial to achieve greater social benefits. Against this background, the University of Southampton has been undertaking the Track to the Future (T2F) project, which is assessing, among other issues, how to produce a quiet ballasted track system that at the same time is cheaper to maintain and renew. This paper considers combinations of engineering interventions that could reduce rail-related noise, including under sleeper pads, rail dampers and noise barriers which all reduce noise emissions. It extends previous analysis of under sleeper pads to compare their costs and benefits with those of rail dampers and noise barriers in the context of a UK-based installation case study.

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Section: Values Of Vibration Ride Quality and Comfortmentioning

confidence: 99%

Noise reduction for ballasted track: A comparative socio-economic assessment

Armstrong¹,

Ortega²,

Blainey³

et al. 2019

Int. J. TDI

View full text Add to dashboard Cite

show abstract

“…The concepts of ride quality and comfort are related but distinct, since comfort is also influenced by other factors such as odours, noise, temperature, lighting etc. On the ride quality aspect, Oborne [39] established some thresholds of comfort, but again gave no financial valuations for these thresholds. Comfort can also be improved by reducing the train speed and consequently the level of vibration [40], but because this would increase travel time and therefore also exposure time, the authors questioned whether this trade-off was worthwhile.…”

Section: Values Of Vibration Ride Quality and Comfortmentioning

confidence: 99%

Noise Reduction for Ballasted Tracks: A Socio-Economic Assessment

Ortega

Blainey

Preston

et al. 2018

WIT Transactions on the Built Environment

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Transport infrastructure produces many externalities. Increased accessibility and the resultant economic development are among the most notable positive ones. Accidents, air and noise pollution, and other environmental issues, such as impacts on biodiversity, landscape and townscape, are the most important negative ones. In the case of railway infrastructure, noise and vibration impacts have a key effect on net social benefit. Noise and vibration reduction is crucial to achieve greater social benefits. In this context, the University of Southampton has been working on the Track to the Future (T2F) project, which is assessing, among other issues, how to produce a quiet ballasted track system that is also cheaper to maintain and renew. This paper considers combinations of engineering interventions that could reduce noise and vibration. These include under sleeper pads which attenuate ground vibration, rail dampers and noise barriers which reduce airborne noise. The effects on noise and vibration of under sleeper pads are determined using detailed engineering models. The overall benefits are then assessed for a notional section of track based on a typical route in the UK.

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“…The discomfort due to vibration may be described by "feeling/sensation" from sitting on a vibrating seat for a short period of time. The discomfort levels were determined in [12] based on "the subject was asked to adjust sensation in order to describe disturbing level, equal sensation and objective sensation both in the different frequency intensity and same frequency intensity". Oborne has investigated a questionnaire method to assess the effects of vibration on passenger discomfort.…”

Section: Journal Of Low Frequency Noise Vibration and Active Controlmentioning

confidence: 99%

“…At around 20-30 Hz head experiences resonance. Four Hz is observed to create discomfort in humans because shoulder, neck and head resonate in some combination at around this frequency [7,9,12].…”

Section: Introductionmentioning

confidence: 99%

Quantification of Human Discomfort in a Vehicle Using a Four-Post Rig Excitation

Ibicek

Thite

2012

Journal of Low Frequency Noise, Vibration and Active Control

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The ride comfort of a vehicle is a vital aspect determining competitiveness of vehicles. The comfort is intricately related to feelings of discomfort due to vibration. The discomfort depends on various dynamic aspects of the suspension-seat and surrounding system. In industry, the discomfort due to vibration is assessed by road testing on various surfaces; these road tests may not be accurately repeatable. Discomfort, in general, can be assessed by measurements based on a shaker table and seat combination. These results when used for "in vehicle situations" may not accurately indicate the level of human discomfort in a vehicle. In view of this, to quantify seated human discomfort in a vehicle, measurements were performed using a four-post rig simulator; the setup allows controlled in-situ experiments to be conducted. A group of six subjects were exposed to sinusoidal vibration at five magnitudes in the vertical direction for heave, roll and pitch motion. The objective is to develop a discomfort metric which could be used to compare vehicles. The preliminary results show varying significance of roll, pitch and heave motion. The results, however, confirm the nonlinear variation of perception as a function of the physical stimulus. The test setup can be used to study the effects of complex road inputs and eventually may contribute towards reduced reliance on road tests.

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Vibration and passenger comfort: Can data from subjects be used to predict passenger comfort?

Cited by 10 publications

References 17 publications

Noise reduction for ballasted track: A comparative socio-economic assessment

Noise reduction for ballasted track: A comparative socio-economic assessment

Noise Reduction for Ballasted Tracks: A Socio-Economic Assessment

Quantification of Human Discomfort in a Vehicle Using a Four-Post Rig Excitation

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