Research on wheel damage of heavy-haul locomotive subjected to longitudinal coupler forces: Formation mechanism and control measures from macro insight
Qinghua Chen , Qian Xiao , Shiqian Chen , Xiangrui Ran , Xiaoyu Hu , Yang Jin , Binjie Xu , Kaiyun Wang
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引用次数: 0
Abstract
The distribution of wheel damage of locomotives subjected to longitudinal coupler forces in heavy-haul trains has not yet been fully understood. Field tests confirm that longitudinal compressive coupler forces are commonly present in scenarios in which the train brakes through long downhill slopes, typically where locomotives are prone to wheel damage. This study employs a wheel damage prediction model based on a comprehensive train dynamics simulation to systematically investigate the influence of train braking operations on the dynamic response of locomotives and the distribution of wheel damage. The braking performance and wheel damage under various slopes and control modes are analyzed, and a feasible boundary for braking control is identified to mitigate wheel damage. Furthermore, two damage control schemes based on the differential distribution of electric braking forces are proposed. Simulation results indicate that coupler forces exacerbate wheel damage on slave control locomotives by affecting the axle load transfer of locomotives and demonstrate that the proposed scheme could effectively suppress longitudinal impulses and control wheel damage. These findings establish a foundational framework for implementing braking control modes that actively reduce wheel damage in locomotives of heavy-haul trains.
期刊介绍:
Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies.
Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials.
Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged.
Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.