Official PDF Translation•Journal of Central South University

A unified analytical model for track deformation mapping and vehicle-track dynamic response induced by substructure deformation

Authors: CHEN Yao; FENG Qing-song; ZHAO Lei; ZHANG Ling; YANG Zhou

DOI: 10.1007/s11771-026-6289-zStatus: Verified Translated Edition

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Key Findings in This Report

• A unified analytical model integrates static track deformation mapping and dynamic vehicle-track interactions under substructure deformation. • Critical conditions for avoiding void formation follow power-law and linear relations for cosine-type and angular-type subgrade settlements, respectively. • Cosine-type settlement with wavelength 15 m and amplitude >35 mm significantly deteriorates vehicle ride quality. • Interlayer separation causes repeated contact-separation-recontact impacts, potentially degrading long-term structural performance.