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Influence and sensitivity analysis of mortar void in CRTS II ballastless slab track on the vehicle-track dynamics

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Abstract

Mortar void is the most prevalent disease in CRTS II ballastless slab track aggravating the service performance of vehicle and track structures. For determining a reliable mortar void limit, the influence of mortar void on the vehicle-track dynamics are analyzed through a refined rigid vehicle-flexible track coupled model, considering the randomness induced by track irregularity. Sensitivity analysis of mortar void are conducted taking into account train operation speeds and track irregularities measured from different railways. The findings suggest that when the train speeds are 250 km/h, 300 km/h and 350 km/h, respectively, mortar void length should be less than 0.98 m, 0.93 m and 0.81 m. Additionally, the impact of mortar void on the vehicle-track system dynamics becomes more pronounced as the amplitude of track irregularity decrease. This study provides a valuable insight for developing an effective maintenance plan for mortar void in CRTS II ballastless slab track.

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Acknowledgments

This work is supported by Research Program Supported by the Natural Science Foundation of Beijing Municipality (Grant Nos. L211007), China, and the National Natural Science Foundation of China (Grant No. 52205085), China.

Author information

Authors and Affiliations

  1. School of Mechanical-Electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China

    Xin Xin & Suxia Zhou

  2. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Zunsong Ren & Chao Yang

Authors
  1. Xin Xin
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  2. Suxia Zhou
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  4. Chao Yang
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Corresponding author

Correspondence to Xin Xin.

Additional information

Xin Xin is a post doctor of the School of Mechanical-Electric and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China. She received her Ph.D. in Mechanical Engineering from Beijing Jiaotong University. Her research interests include vehicle-track coupled dynamics and structural health monitoring.

Suxia Zhou is a Professor at the School of Mechanical-Electric and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China. She received her Ph.D. in Mechanical Engineering from Beijing Jiaotong University. Her research interests include vehicle-track coupled dynamics, strength and reliability of the vehicle structures as well as the structural health monitoring.

Zunsong Ren is a Professor at the School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, China. He received his Ph.D. in Mechanical Engineering from Southwest Jiaotong University. His research interests include vehicle-track coupling dynamics, strength and reliability of vehicle structures and load spectrum.

Yang Chao is an Assistant Professor at the School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, China. He received his Ph.D. in Vehicle Engineering from Southwest Jiaotong University. His research interests include vehicle dynamics, vibration and noise control.

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Xin, X., Zhou, S., Ren, Z. et al. Influence and sensitivity analysis of mortar void in CRTS II ballastless slab track on the vehicle-track dynamics. J Mech Sci Technol 38, 557–568 (2024). https://doi.org/10.1007/s12206-024-0105-1

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  • DOI: https://doi.org/10.1007/s12206-024-0105-1

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