Overview of critical risk factors in Power-Two-Wheeler safety

Vlahogianni, Eleni I.; Yannis, George; Golias, John

doi:10.1016/j.aap.2012.04.009

Cited by 128 publications

(67 citation statements)

References 82 publications

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“…Para os casos FRC, equação (14), e FSR, equação (15), uma vez determinada a desaceleração (a), a distância de frenagem pode ser determinada pela equação (16), classicamente conhecida como Equação de Torricelli.…”

Section: Desaceleração E Distância De Frenagemunclassified

“…No caso µ D = µ T , considerando a força de resistência constante, a equação (20) torna-se a equação (14) No caso de resistência nula, torna-se a equação (15).…”

Section: Desaceleração E Distância De Frenagemunclassified

“…Eles estudam erros de tráfego, erros no controle da motocicleta, violações de limite de velocidade, realização de manobras perigosas e o uso de equipamentos de segurança. Vlahogianni et al [15] discutem os riscos específicos do uso das motocicletas. Em particular, destacamos a seção em que eles apresentam os riscos associadosà infraestrutura, que incluem o tipo de piso, geometria das estradas, visibilidade do piloto e perda de controle durante frenagens e curvas.…”

Section: Conclusõesunclassified

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Estudo da dinâmica das motocicletas em frenagens e curvas: O efeito da técnica do piloto e da condição da estrada

Magnani

Cunha

2017

Rev. Bras. Ensino Fís.

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O estudo das motocicletas apresenta um interessante exemplo de ensino que combina teoria, tecnologia e prática. Neste artigo, apresentamos um estudo dinâmico típico efetuado na disciplina Engenharia da Motocicleta, UFPE. O problema em questãoé determinar quando uma motocicleta deve iniciar a sua frenagem e qualé a máxima velocidade em que pode fazer uma determinada curva. Para estudar esse movimento, modelamos a dinâmica da motocicleta em linha reta e depois em curva, considerando as forças inerciais, as forças resistivas, e as forças controladas pelo piloto (propulsão e frenagem). Os modelos matemáticos são então usados para estudar a mínima distância para iniciar a frenagem e a máxima velocidade possível na curva, considerando limites de aderência e a possibilidade de perda de contato de uma das rodas. Como resultado, concluímos que, do ponto de vista da segurança,é importante a consideração das forças resistivas no modelo da velocidade máxima em curva, mas não no cálculo da distância mínima de frenagem. Outro resultado importanteé que a técnicaótima de frenagem (proporção do freio dianteiro e traseiro)é função do coeficiente de atrito, não sendo interessante recomendar aos pilotos uma proporção universal. Palavras-chave: motocicleta, frenagem, dinâmica na curva.The study of motorcycles presents an interesting example of teaching that combines theory, technology and application. In this paper, we present a typical dynamic study conducted in the discipline of Motorcycle Engineering, UFPE. The problem is to determine when a motorcycle should begin its breaking and what would be the maximum speed to make a curve. To study this phenomenon, we model the dynamics of the motorcycle on straight and curved paths, considering the inertial forces, resistive forces and the forces controlled by the rider (propulsion and braking). The models are then used to study the minimum distance to start the braking and the maximum possible cornering speed, considering the limits of adhesion and the possibility of loss of contact of one of the wheels. As result, we conclude, from a safety point of view, that it is important to consider the resistive forces on the model of maximum cornering speed, but not in the calculation of the minimum braking distance. Another important result is that the optimum braking technique (ratio of front and rear braking) is a function of the friction coefficient, so it is not interesting to recommend to the riders a universal proportion.

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Section: Desaceleração E Distância De Frenagemunclassified

“…No caso µ D = µ T , considerando a força de resistência constante, a equação (20) torna-se a equação (14) No caso de resistência nula, torna-se a equação (15).…”

Section: Desaceleração E Distância De Frenagemunclassified

Section: Conclusõesunclassified

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Estudo da dinâmica das motocicletas em frenagens e curvas: O efeito da técnica do piloto e da condição da estrada

Magnani

Cunha

2017

Rev. Bras. Ensino Fís.

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“…Both of them are launched in order to increase the capability of institutional management arrangement, but the result of a preliminary investigation shown that the pattern of the current traffic accident risk management were not integrated (Vlahogianni, et al,2012) where most of accident risk management activities were done partially. Accident's causes and triggers variables were identified and analyzed separately such that the recommendation could not be directly applied.…”

Section: Introductionmentioning

confidence: 99%

Pengembangan Metode Pengelolaan Risiko Kecelakaan Lalu Lintas

Gaspar¹,

Malkhamah²,

Suparma³

2016

warlit

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The lack of resource capacity is proved to be a barrier to the accident risk management measures. However, previous studies show that most of causes (risk factor) and risk trigger were still analyzed separately while an integrated risk management scheme is very limited. The aim of this study is to develop integrated traffic accident risk management method (scheme). It is developed based on the result of investigation toward the substance of current accident risk management pattern. It was found that 1) the variables coverage in risk analysis process should accomodate not only risk factor but also risk triggers and their descriptive variables 2) to minimise the uncertainty in risk analysis method, the election of the periodical time, duration and location of the survey should be in accordance with the contextual needs 3) it is required to develop appropriate scheme of accident risk management by integrating all related variables suite to local conditions comprehensively and proportionally. In addition, stopping sight distance model is recommended to being used in accident risk analysis. Keywords: accident risk management pattern, integrated approach, risk management scheme, uncertainty risk ABSTRAK

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“…Braking system is divided by two categories of brake system which is a drum brake system and disc brake system [2]. The difference between them is the mechanism and the components used in the assembly of the system.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis on motorcycle disc brake geometry

Talib

Ismail

2017

AIP Conference Proceedings

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Abstract.Braking is a phase of slowing and stop the movement of motorcycle. During braking, the frictional heat was generated and the energy was ideally should be faster dissipated to surrounding to prevent the built up of the excessive temperature which may lead to brake fluid vaporization, thermoelastic deformation at the contact surface, material degradation and failure. In this paper, solid and ventilated type of motorcycle disc brake are being analyse using Computational Fluid Dynamic (CFD) software. The main focus of the analysis is the thermal behaviour during braking for solid and ventilated disc brake. A comparison between both geometries is being discussed to determine the better braking performance in term of temperature distribution. It is found that ventilated disc brake is having better braking performance in terms of heat transfer compare to solid disc.

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Overview of critical risk factors in Power-Two-Wheeler safety

Cited by 128 publications

References 82 publications

Estudo da dinâmica das motocicletas em frenagens e curvas: O efeito da técnica do piloto e da condição da estrada

Estudo da dinâmica das motocicletas em frenagens e curvas: O efeito da técnica do piloto e da condição da estrada

Pengembangan Metode Pengelolaan Risiko Kecelakaan Lalu Lintas

Thermal analysis on motorcycle disc brake geometry

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