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Load variation of the wheel-mounted brake disc bolts of a high-speed train
- Source :
- Engineering Failure Analysis. 119:105001
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The reliability of brake disc bolts is crucial to the operational safety of high-speed electrical multi-units (EMUs). It is of great significance to investigate the bolt loads to ensure the bolt service life. A theoretical analysis is completed according to the jointed structure and the service condition of the bolts. By establishing a finite element model of the wheel-rail contact, the bolt loads of the wheel-mounted brake disc under high-speed rotation are simulated. A field experiment is implemented to obtain the dynamic loads of wheel-mounted brake disc bolts of a Chinese high-speed train based on a load test technique. The tested bolt loads include the tensile force, radial bending moment and circumferential bending moment. The simulation results are compared with the field test data. It validates the finite element model. The results indicate that the bolt loads are closely related to the operation speed of the high-speed EMU. The theoretical calculation method and the finite element method both prove that the amplitude and the direction of the radial bending moment along the bolt are inconsistent. The extrema of the radial bending moments appear in the left, middle and right cross-sections. The radial bending moment at the left cross-section is larger than that at the right cross-section because of the asymmetry of the wheel structure.
- Subjects :
- business.industry
General Engineering
020101 civil engineering
02 engineering and technology
Structural engineering
computer.software_genre
Rotation
Finite element method
0201 civil engineering
law.invention
Load testing
020303 mechanical engineering & transports
Amplitude
0203 mechanical engineering
law
Service life
Bending moment
General Materials Science
Disc brake
business
computer
Test data
Mathematics
Subjects
Details
- ISSN :
- 13506307
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- Engineering Failure Analysis
- Accession number :
- edsair.doi...........491319ba03e38567a02699d05fb6d228