Life cycle analysis of mitigation methodologies for railway rolling noise and groundbourne vibration

2016

Environments

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A focus of the railway industry over the past decades has been to research, find and develop methods to mitigate noise and vibration resulting from wheel/rail contact along track infrastructure. This resulted in a wide range of abatement measures that are available for today's engineers. The suitability of each method must be analysed through budget and timeframe limitations, which includes building, maintenance and inspection costs and time allocation, while also aiming at delivering other benefits, such as environmental impact and durability of infrastructure. There are several situations that need noise and vibration mitigation methods, but each design allocates different priorities on a case-by-case basis. Traditionally, the disturbance caused by railways to the community are generated by wheel/rail contact sound radiation that is expressed in different ways, depending on the movement of the rolling stock and track alignment, such as rolling noise, impact noise and curve noise. More specifically, in special trackworks such as turnouts (or called "switches and crossings"), there are two types of noise that can often be observed: impact noise and screeching noise. With respect to the screeching (or flanging), its mitigation methods are usually associated with curve lubrications. In contrast, the impact noise emerges from the sound made by the rolling stock moving through joints and discontinuities (i.e., gaps), resulting in various noise abatement features to minimise such noise impact. Life cycle analysis is therefore vital for cost efficiency benchmarking of the mitigation methods. The evaluation is based on available data from open literature and the total costs were estimated from valid industry reports to maintain coherency. A 50-year period for a life cycle analysis is chosen for this study. As for the general parameters, an area with a high density of people is considered to estimate the values for a community with very strict limits for noise and vibration.

Section: Resilient Wheelsupporting

confidence: 91%

“…As rail damping can be used as a complement to other methods, with reasonable results, it is important to know whether this addition to railway maintenance methodology is feasible economically speaking [21,[25][26][27][28][29][30].…”

Section: Rail Dampingmentioning

confidence: 99%

Life Cycle Cost Evaluation of Noise and Vibration Control Methods at Urban Railway Turnouts

Freitas

2016

Environments

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“…The critical track assets are track components (i.e., rail, lubrication systems, fastening systems, sleepers, ballast, and formation/foundation), electrification (i.e., overhead line equipment), track support structures (i.e., bridges and viaducts), and interface infrastructure (i.e., platforms). Figure 1 illustrates the critical track assets, track inspection activities, data analytic and decision making process Remennikov, 2006, 2008b;Kaewunruen, 2014Kaewunruen, , 2018Kaewunruen and Ishida, 2016;Tuler and Kaewunruen, 2017;Ngamkhanong et al, 2018a). Total track inspection activities are grouped into on-board monitoring (using a train and equipped sensors) and on-site inspections (through detailed equipment and human resources).…”

Section: Fixed Assets and Total Inspectionmentioning

confidence: 99%

The Total Track Inspection

Osman

Rungskunroch

2019

Front. Built Environ.

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Operations of railway business have always placed "safety" as the first priority. Managing "public safety" requires integral risk monitoring and management. The risk monitoring for rail infrastructure management relies on accurate health monitoring and integrated track inspection. Health monitoring of all rail assets have given rise to "Big Data," which have been derived and recorded from on-board monitoring and on-track inspections of both fixed and mobile assets. In this paper, the safety-critical inspections of fixed assets or railway infrastructures have be emphasized in order to obtain the integral insights into track defects, irregularities and deterioration of track geometry and components. This paper highlights the systems-based integration framework of on-board and on-site inspection data for railway track integrity assurance under uncertain settings. The risks and consequences of extreme climates have been considered in order to improve adaptiveness, agility, and readiness of the systems-based framework of the total track inspection activities that could underpin and assure track infrastructure integrity and resilience. New challenges in observational field data have been highlighted as the evidences for the necessity for the adaptive systems-based framework of the total track inspection.

“…Several studies addressing the life-cycle cost analysis of a turnout could be found in the literature. However, most of them do not consider the extreme weather events which has an influence on the system resilience [2,[12][13][14][15][16]. Writers' first article on the subject considers this effect; however, it was conducted with a deterministic approach, which was a preliminary study.…”

mentioning

confidence: 99%

A Stochastic Approach for Life-Cycle Cost Analysis of Railway Turnouts Exposed to Climate Uncertainties

Hamarat

2018

I-Rise 2018

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