Xiaoxue Zhu , Chaojiang Hao , Ce Liang , Taoshuo Bai , Yao Qian , Jingmang Xu , Ping Wang
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引用次数: 0
Abstract
The fatigue damage occurring at the rail bottom is one of the most common forms of damage observed in high-speed turnout. The dynamic mechanical behaviour of the wheel-rail system and the mechanical properties of the rail material are key factors influencing this fatigue damage. In this paper, a refined high-speed vehicle-frog dynamic interaction analysis model, which takes into account the material properties and complex constraints, was developed. The unreplicated saturated factorial design method was used to identify factors significantly influencing the multi-axial vibration fatigue of the frog. The time domain and frequency domain statistical characteristics of the rail load and rail bottom stress in the frog were then analysed. Additionally, the Gaussianity and stationarity of the random load in the frog were assessed. Using non-parametric kernel density estimation, the load was extrapolated, and a full life cycle load spectrum for the frog rail was developed. Finally, a mapping relationship between the load and rail bottom stress was established.
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.
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