Analysis of the axial load of bolts of wheel-mounted brake discs of high-speed trains

Qu, Junsheng; Wang, Wenjing; Wang, Binjie; Li, Guoshun; Jiao, Biaoqiang

doi:10.1016/j.engfailanal.2022.106250

Cited by 9 publications

(6 citation statements)

References 22 publications

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“…Thermal phenomena, as non-linear phenomena, increase the degree of complexity of the studied phenomenon. In the literature, apart from the analysis of deformations and the analysis of the heat flux flow between the brake disc and the brake linings, one can also find the analysis of the impact of heat flow on the elements that are part of the braking system, such as connecting bolts [19,27]. A general review of simulation methods is presented extensively in this paper [25].…”

Section: Vehicle Brakingmentioning

confidence: 99%

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Finite Element Method analysis application in identifying the causes of brake disc failure

Ambroszko,

Dudziński,

Walczak

2024

Combustion Engines

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This article presents the results of brake disc tests aimed at identifying the causes of its failure. The first part of the article presents an analysis of the damageability of selected vehicle components, which showed that among the reported failures, the most failure was the braking system. The assessment of the brake disc worn "properly" as a result of operation and the deformed brake disc after a very short period of operation, which was the subject of further analysis. The next part of the article presents issues related to the modeling of thermal loads, and then, trying to assess and search for the cause of abnormal wear of the brake system element, the use of the Finite Element Method for the analysis and assessment of brake disc wear was proposed. In the final part of the article, conclusions and directions for further work were formulated.

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Section: Vehicle Brakingmentioning

confidence: 99%

“…This means that during intensive, short-term braking, brake cooling contributes little to the energy balance. Heat flow plays an important role in the analysis of long-term or repeated braking cycles [19,26,27].…”

Section: Issues Of Heat Exchange With the Environmentmentioning

confidence: 99%

Finite Element Method analysis application in identifying the causes of brake disc failure

Ambroszko,

Dudziński,

Walczak

2024

Combustion Engines

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“…Chakherlou [4] using an experimental method found that, Increasing the tightening torque or clamping force on the double shear lap joints, leads to improved fatigue life. Junsheng Qu [5] The maximum load of bolt appears in the condition with an initial braking speed of 280 km/h. For the mechanical structure and materials research, Takao [6] investigated one Hawker 125-800XP jet, to determine the root cause of the failure of wheel, and found that intergranular region surrounded by a ductile field on the surface of fracture.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of one main wheel hub bolt fracture of A320 aircraft

Ma,

Zhang,

et al. 2024

J. Phys.: Conf. Ser.

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When an aircraft was performing flight tasks, it was found that one connecting bolt of No. 3 main wheel was missing during the short stop inspection. The bolt uses 148 ups and downs this time, and the use time is significantly lower than normal. It is inferred that the high probability of its fracture is not caused by long-term use, and it is speculated that the fracture reason is related to the quality of the bolt itself. Material analysis showed that there were no obvious abnormalities in the bolt material, and slight scratches were found near the bolt. The bolt is fatigue fracture and the fracture position is located at the transition arc position. Microscopic observation shows that there is a V-shaped groove on the side of the crack source area, but because the gasket is no longer in the installation position, it cannot directly determine the installation problem of the gasket. It is recommended to optimize the installation process and NDT (No Destructive Testing, NDT) detection process in the future.

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“…During the long-term operation, bolts are prone to looseness due to the variable speeds and loads in the periodic speeding-braking working conditions as well as the dramatic variation of temperature. 1,2 When bolt looseness occurs, the brake disc may run out of the effective braking load and be unable to stop the high-speed train within the effective brake distance, which may cause severe accidents. Therefore, it is of great importance to effectively detect the bolt looseness for the safe operation of high-speed rail.…”

Section: Introductionmentioning

confidence: 99%

Bolt Looseness Detection in Brake Disc of High-Speed Rail Using Wavelet Packet Decomposition and 1D Convolutional Neural Network

Xiao,

Li,

Guan

et al. 2024

The International Journal of Acoustics and Vibration

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The effective and in-time detection of bolt looseness in the brake disc of high-speed rail is of great significance to ensure the safe operation of the train. The hammer tapping method is one of the most widely used methods for bolt looseness detection. Due to the complex structure of the brake disc, the vibration characteristics associated with bolt looseness are coupled with the transmission path from the head of the bolt through the brake disc to the sensors, which make it difficult to quantitively identify the bolt looseness. In this work, a method based on wavelet packet decomposition and a one-dimensional convolutional neural network (1D CNN) is proposed to quantitively detect the bolt looseness of brake disc. Firstly, the vibration signals collected from the two sensors mounted on the nut side are fused by autocorrelation summation to reduce the influence of transmission path. Secondly, the fused signal is decomposed to sub signals in low frequency and high frequency components by wavelet packet decomposition. The relative difference of wavelet packet energy among sub signals is extracted as the features to enhance the difference among different degrees of looseness. Finally, the 1D CNN model is established and trained by the features of energy relative difference to quantitively identify the bolt looseness. To validate the effectiveness of the proposed method, an experimental platform for bolt looseness detection in brake disc is constructed. Compared with the single-channel 1D CNN and fused signal-1D CNN models, the accuracy of the proposed method is approximately 97%, which confirms the superiority of the proposed method.

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Analysis of the axial load of bolts of wheel-mounted brake discs of high-speed trains

Cited by 9 publications

References 22 publications

Finite Element Method analysis application in identifying the causes of brake disc failure

Finite Element Method analysis application in identifying the causes of brake disc failure

Failure analysis of one main wheel hub bolt fracture of A320 aircraft

Bolt Looseness Detection in Brake Disc of High-Speed Rail Using Wavelet Packet Decomposition and 1D Convolutional Neural Network

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