Abstract
The mortar layer of the slab ballastless turnout is the weakest connecting part compared to the rest of the structure, meaning debonding between the turnout slab and the mortar layer is prone to occur under the dynamic load of a train. In order to study the impact of debonding on the vibration response of the wheel-rail system in the turnout area, a rigid-flexible vehicle-turnout coupled dynamic model that takes debonding into account was established based on the theory of vehicle-track coupled dynamics; the flexible deformation of the multi-rail and turnout slab was also included in the model. The impact of debonding on the wheel load transition and the vibration acceleration of the turnout structure and axle box were then analysed. The results show that: There are significant differences in the impact of different types of debonding on the vibration response of the vehicle-track coupled system. When the debonding height is less than the voiding limit, the impact of the debonding height is significant, while the vibration acceleration of the vehicle-turnout system remains basically unchanged once debonding height reaches the void limit.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
