In situ measurements of the crossing vibrations of a railway turnout

Boogaard, Anthonie; Li, Zili; Dollevoet, Rolf

doi:10.1016/j.measurement.2018.04.094

Cited by 28 publications

(17 citation statements)

References 11 publications

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“…Outros autores têm se esforçado para realizar medições com uso de acelerômetros para auxiliar na análise e prevenção dos descarrilamentos, como é o caso deste estudo. Boogaard et al (2018) Com base em um coeficiente de atrito µ de 0,5 e um ângulo de flange β de 67 graus, um limiar de L/V de 0,8 que é comumente adotado em estudos de segurança ferroviária (Liu & Magel, 2012), entretanto, conforme cita Vlakhova (2015), nem sempre a equação de Nadal garante a não ocorrência de um descarrilamento. Ainda, segundo Santos & Barbosa (2016), os critérios para análise de descarrilamentos, majoritariamente, não consideram a dinâmica do veículo e a geometria da via permanente em conjunto.…”

Section: Dinâmica Dos Descarrilamentosunclassified

Contribuição à manutenção da via permanente com acelerômetros em pacotes inerciais portáteis

Lima

Lopes

Filho

2021

RSD

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O monitoramento de condições dos sistemas ferroviários tem sido amplamente utilizado para apoiar a avaliação da integridade de suas estruturas. A inspeção geométrica da via permanente é um dos principais métodos utilizados para a elaboração de planos de manutenção da malha ferroviária. Sabe-se que as intervenções são baseadas nas indicações de inconformidades, de acordo com intervalos pressupostos para os parâmetros analisados. Entretanto, mesmo com a referida inspeção, continuam a ocorrer descarrilamentos oriundos da superestrutura. O artigo apresenta a utilização de um dispositivo inercial em seis trechos ferroviários, de forma a complementar as inspeções geométricas e priorizar a escala de manutenção. A execução deste estudo justifica-se, pois, os equipamentos comumente utilizados na medição da dinâmica de via possuem preços elevados e alta complexidade de instalação. O acelerômetro empregado é de baixo custo e apresenta fácil aplicação. O referido dispositivo foi capaz de identificar pontos críticos de interação veículo-via, que não apresentavam exceção de geometria.

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Section: Dinâmica Dos Descarrilamentosunclassified

Contribuição à manutenção da via permanente com acelerômetros em pacotes inerciais portáteis

Lima

Lopes

Filho

2021

RSD

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“…The dynamic behavior of the train-track interaction at railway crossings has been investigated using both numerical simulations [1][2][3] and field measurements [4][5][6]. Impact tests [3,5] and pass-by (or trackside) measurements [2,6] are two primary ways to identify the dynamic characteristics of a railway crossing. The impact test method is broadly accepted as a standard method for the identification of railway track dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…The main advantage of the impact test is that the input excitation (usually with a hammer) can be measured so that the frequency response function (FRF) can be directly derived. However, previous studies [2][3][4][5][6] focus more on the dynamics of the crossing nose while ignoring its coupling with the substructures, e.g. the sleeper and ballast.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Method for Railway Crossing Monitoring Based on Ambient Vibration Caused by Train-Track Interaction

Shen

Dollevoet

2020

Lecture Notes in Mechanical Engineering

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Railway crossings are critical components in the rail network. They usually degrade faster than the other components. It is therefore vital to monitor their conditions using appropriate methods. This paper proposes to use the ambient vibration caused by the train-track interaction from a distance to monitor the condition of railway crossings. Both impact tests and pass-by measurements were performed on an instrumented crossing. The eigenfrequencies and mode shapes in the frequency range of 10-2000 Hz are first identified by impact tests using three different devices, i.e. a falling weight device, a big hammer and a small hammer. For the pass-by measurement, the dynamic features of both the wheel-crossing impact and ambient vibration are analyzed using time-frequency representations. It is shown that the ambient vibration signals are stationary and contain several characteristic frequencies. Then a method based on the frequency domain decomposition is applied to the ambient vibration signals to further identify the frequency components. It is found that the frequencies identified from the pass-by measurement agree well with the eigenfrequencies identified from the impact test. The proposed method can be further developed to continuously monitor the condition of railway crossings without interrupting train operations.

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“…At present, it is easy to ignore these factors when simulation is used for research, and hence, it is necessary to study the characteristics of vibration of the turnout using an experimental method. 12…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the characteristics of vibration source in urban rail transit turnouts

Wang

Zhao

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part F:

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Due to the structural characteristics of railway turnouts, as well as their vulnerability to damage and other problems, the environmental vibrations induced by urban rail transit often have a greater effect on the railway turnouts than that on an ordinary line. Therefore, it is necessary to carry out an in-depth study on the characteristics of vibration source on the turnouts. In this paper, a group of representative turnouts is selected for field testing on four typical lines of different operational times in a Chinese city. The profile and rail irregularity of the turnouts are measured to evaluate the service condition of the turnouts and the wheel–rail interaction. The vibration acceleration of the track structure and tunnel wall is measured as the train passes the turnout by setting the measuring points in the two main vibration sources, including the switch and the crossing section. The time–frequency domain analysis method is used to analyze these data. It is found that the source strength of the tunnel wall in the crossing section is much greater than that in the switch section, and that the lateral vibration level is often greater than the vertical vibration level. Unexpectedly, there is a low positive correlation between the vibration level and the train speed, while the healthy state of the turnout rails has a great influence on the vibration level. According to the results of the research, the sources of vibration excitation in the turnouts are complex; therefore, it is necessary to comprehensively evaluate their environmental impact and take corresponding vibration control measures.

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In situ measurements of the crossing vibrations of a railway turnout

Cited by 28 publications

References 11 publications

Contribuição à manutenção da via permanente com acelerômetros em pacotes inerciais portáteis

Contribuição à manutenção da via permanente com acelerômetros em pacotes inerciais portáteis

A Novel Method for Railway Crossing Monitoring Based on Ambient Vibration Caused by Train-Track Interaction

An experimental study on the characteristics of vibration source in urban rail transit turnouts

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