The Development of a Rail Passenger Coach Car Crush Zone

Mayville, Ronald A.; Johnson, K; Stringfellow, Richard; Tyrell, David

doi:10.1115/rtd2003-1653

Cited by 22 publications

(7 citation statements)

References 1 publication

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“…Most of the relevant projects were launched and completed during the last two decades. While there are some studies dealing with the crashworthy design of new rail vehicles [8][9][10] and with the crashworthiness assessment of existing conventional rail vehicles [11,12], no literature has been found by the authors focusing on analysing and improving the structural characteristics and weaknesses of existing conventional vehicles with respect to crashworthiness.…”

Section: Introductionmentioning

confidence: 99%

Analysis of crush behaviours of a rail cab car and structural modifications for improved crashworthiness

Xue¹,

Smith²,

Schmid³

2005

International Journal of Crashworthiness

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Section: Introductionmentioning

confidence: 99%

Analysis of crush behaviours of a rail cab car and structural modifications for improved crashworthiness

Xue¹,

Smith²,

Schmid³

2005

International Journal of Crashworthiness

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“…However, as soon as the impact force becomes comparable with the gravitational effect, without any other restriction, the situation in the vertical direction could be serious. Hence, shear-off couplers have been recommended 16 as a crashworthy measure when the compressional force is increased to a certain level. Corrugated panels are installed on vehicle ends to increase frictional forces in the vertical direction to support the gravitational force for vertical balance.…”

Section: Collision Stability Of Trainsmentioning

confidence: 99%

Rail vehicle impact analysis: A critique of the suitability of the rigid wall model and the assumption of symmetrical behaviour

Xue

Robinson

Schmid

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper studies the accuracy of rigid-wall (stonewall) and symmetric models in rail vehicle impact stability. The investigation is based on modelling results and theoretical analysis. The theoretical investigation consists of a mechanical description of the conservation of energy transformation and instability of train impact due to irregular structural collapse and loose coupling patterns. It is shown that an unstable response is a common consequence in vehicle impacts and the corresponding stiffness amongst cross-sections has a strong effect on collapse stability. The modelling investigation summarises impact simulations of a cab vehicle. This illustrates the pitfalls of the rigid-wall and symmetric models as follows: firstly, using a rigid wall in modelling could mask irregular deformations and lead to overestimated crashworthy performance behaviours; and secondly, symmetric impacts could lead to asymmetric deformations resulting in crucial irregular responses of rail vehicles being missed. This paper explores the irregular responses of rail vehicles in train collisions and highlights the relevant issues which might be overlooked when conventional static approaches are used in dynamic scenarios. It is anticipated that the paper will provide increased insight into impact mechanics of rail vehicles and promote a rethink about the influence of characteristic behaviours in dynamic responses resulting in a more accurate representation.

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“…Due to the inherent strength of these components, the coupler is designed to 'break away' when the impact force reaches a certain level [9,10], typically around 2000 kN. This coupler break away prevents vehicle end deviation from the centric position induced by the coupler movement as it pivots between adjacent vehicles, a type of 'pole vault' effect.…”

Section: Introductionmentioning

confidence: 99%

Qualitative Comparison of the Characteristics of Articulated and Non-Articulated Trains and Their Effects on Impact

Xue

Ingleton

Roberts³

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part F:

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This article presents a qualitative comparison of the key characteristics and subsequent impact performance for articulated and non-articulated train types. The fundamental purpose of the article is through a review of articulated and non-articulated trains in terms of impact stability to identify and compare the areas referred to as 'impact worthiness' design.The major differences between articulated and non-articulated trains are highlighted first. Then, the mechanical reasons leading to the differences and their consequences to impact performance are analysed from three viewpoints: coupling stiffness and freedom, support and coupling patterns, and carbody structural features. The analysis shows that the differences in bogie support positions on the carbody and the effects on coupling devices lead to differences in several structural and compositional characteristics, including height of gravity of the carbody, length of the vehicle, the composition of the end panel, stiffness of coupling device, number of support points to vehicle, and support height of the secondary suspension.These characteristics result in different impact responses for the two types of train and are directly related to subsequent behaviour. Articulated trains show stiff connection and integral performance in collisions but with less capability for absorbing impact energy between vehicles, whereas non-articulated trains show flexible connection with more random behaviour in collisions but with greater options for energy absorber installation between vehicles.

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The Development of a Rail Passenger Coach Car Crush Zone

Cited by 22 publications

References 1 publication

Analysis of crush behaviours of a rail cab car and structural modifications for improved crashworthiness

Analysis of crush behaviours of a rail cab car and structural modifications for improved crashworthiness

Rail vehicle impact analysis: A critique of the suitability of the rigid wall model and the assumption of symmetrical behaviour

Qualitative Comparison of the Characteristics of Articulated and Non-Articulated Trains and Their Effects on Impact

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