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Model of Contact Temperature Fields in a Composite Cylinder of a Modernized Locomotive Frame

Galina KhromovaFaculty of Railway Transport Engineering, Tashkent State Transport University, Tashkent 100176, UzbekistanDavran RadjibaevFaculty of Railway Transport Engineering, Tashkent State Transport University, Tashkent 100176, UzbekistanJingyong ZhangSchool of Material and Physics, China University of Mining and Technology, Jiangsu, Xuzhou 221116, ChinaAliya ZabiyevaFaculty of Transport and Energy, Eurasian National University, Astana, KazakhstanKyrmyzy BalabekovaFaculty of Transport and Energy, Eurasian National University, Astana, KazakhstanAsylbek Zh. KasenovToraighyrov University, Pavlodar, Kazakhstan; Kazakh National University of Water Management and Irrigation, Taraz 080000, KazakhstanUmida ZiyamukhamedovaFaculty of Railway Transport Engineering, Tashkent State Transport University, Tashkent 100176, UzbekistanRavshanbek MirsaatovFaculty of Railway Transport Engineering, Tashkent State Transport University, Tashkent 100176, UzbekistanFei Zhou

2026

Ochiq kirishOlmos

Litsenziya: cc-by

ABI

Annotatsiya

The reliability and durability of electric locomotive frames are strongly influenced by coupled thermomechanical effects arising during structural modernization, particularly due to welding-induced temperature gradients and operational dynamic loads. However, existing studies on composite cylindrical structures typically address thermal contact or mechanical loading separately, limiting their applicability to real conditions.This study proposes a unified numerical–analytical framework for the coupled analysis of contact temperature fields and the stress–strain state in composite cylindrical elements of modernized locomotive frames (VL80s series). The approach integrates three-dimensional heat conduction with spatial elasticity theory, enabling simultaneous consideration of welding-induced thermal effects and dynamic loading. The governing boundary value problems are solved using Fourier–Bessel series expansions, Laplace transforms, and iterative piecewise linear approximation. The model is calibrated using experimental data obtained from full-scale locomotive tests and validated against finite element simulations (SolidWorks). The results demonstrate high predictive accuracy, with deviations from experimental measurements within 3–10%. Structural reinforcement by welded plates reduces peak stresses in critical zones by 10–15%, while maintaining safety factors above regulatory limits (≥1.4), even under material aging conditions. The influence of thermal contact stresses is shown to be moderate but essential for accurate durability assessment. The main contribution of this work lies in the development of an experimentally validated coupled thermomechanical model and an efficient engineering-oriented computational algorithm for composite cylindrical structures under combined loading conditions. The proposed methodology provides a reliable tool for the design, modernization, and residual life assessment of locomotive frames and can be extended to other transport and mechanical systems operating under similar thermomechanical environments.

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Identifikatorlar

DOI: 10.31181/rme558

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