The suggestion of the standardized finite element model through the experimental verifications of various railway vehicle structures made of sandwich composites

Ko, Hee-Young; Shin, Kwang-Bok; Hahn, Sung-Ho

doi:10.1007/s12206-011-0228-z

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Such vibration signals may be acquired from an in scale prototype of the actual system [22], or from the real vehicle by inserting "safe" fault types and magnitudes as for instance it is the reduction of the air pressure in an airspring, the loosening of bolts on the mounting of a damper and so on (also see Ref. [14]), or through a physics-based model such as a finite element model [27].…”

Section: Introductionmentioning

confidence: 99%

Vibration based fault diagnosis for railway vehicle suspensions via a functional model based method: A feasibility study

2015

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The design of a vibration based fault detection and isolation (FDI) unit that can tackle the combined problem of fault detection, isolation (or identification) and magnitude estimation (collectively known as fault diagnosis), in railway vehicle suspensions is presented. The unit is initially "trained" in a baseline phase based on data obtained from a simplified physics-based model of a railway vehicle suspension. Fault diagnosis is subsequently achieved in an inspection phase through a single, properly preselected, pair of vibration signals acquired from the vehicle, and a recently introduced data-based method, referred to as the functional model based method (FMBM), without resorting to the physics-based model of the baseline phase. The method's cornerstone is the novel class of stochastic ARX-type models capable of accurately representing a system in a faulty state for its continuum of fault magnitudes. Fault diagnosis feasibility in a railway vehicle suspension is demonstrated via Monte Carlo simulations using different types and magnitudes of faults in the physics-based model and generating vibration signals corresponding to the healthy and faulty suspension. Two vibration signals are used by the diagnosis unit: the track velocity profile and the vehicle body acceleration above the trailing airspring. Fault diagnosis based on the FMBM is effective in a compact and unified statistical framework accounting for experimental and modelling uncertainty through appropriate interval estimates and hypothesis testing procedures. The unit is shown to exhibit high sensitivity and accurate estimation of even very small fault magnitudes, to detect and isolate unknown faults for which it has not been trained, and to be robust to high measurement noise, car body mass variations, and varying track irregularity.

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Section: Introductionmentioning

confidence: 99%

Vibration based fault diagnosis for railway vehicle suspensions via a functional model based method: A feasibility study

2015

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The impact performance of honeycomb-filled structures under eccentric loading for subway vehicles

Yao

Xiao

et al. 2018

Thin-Walled Structures

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Strength consideration on car body of light rail transit making from aluminum extrusion

Syaifudin

Nurfadillah

Farid³

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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There are two common series of aluminum alloy that used to construct car body of light rail transit (LRT), i.e. Al 6061 and Al 6005a. Type of Al 6005a has lower strength but cheaper rather than Al 6061. In this numerical study, their extrusion characteristics based on strength consideration are analyzed using ANSYS Workbench 18. The 3D solid model is extracted from interior-exterior facet models of LRT. To save computational time, the car body model is simplified by removing fillets and then generating a symmetrical model. Anyhow, the effect of fillet removal is also studied by introducing a correction factor. Four cases of static loading are given to observe actual loading phenomena that could occur. The simulation results indicated that Al 6005a has better characteristics to be used for constructing the car body of LRT. In addition, simplifying the model in the FEM simulation of a rail-based car body using a shell element type and applying a correction factor to the simulation results is a breakthrough simulation method that could improve the accuracy of the results.

show abstract

The suggestion of the standardized finite element model through the experimental verifications of various railway vehicle structures made of sandwich composites

Cited by 4 publications

References 8 publications

Vibration based fault diagnosis for railway vehicle suspensions via a functional model based method: A feasibility study

Vibration based fault diagnosis for railway vehicle suspensions via a functional model based method: A feasibility study

The impact performance of honeycomb-filled structures under eccentric loading for subway vehicles

Strength consideration on car body of light rail transit making from aluminum extrusion

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