Investigation into Influence of Thermal-oxidative Aging of Rubber Damping Components on Coupled Vibration between High-speed Train Body and Under Classis Equipment

doi:10.3901/JME.2025.20.182

Abstract

Abstract: Analysis of the Change in Dynamic Mechanical Properties of Rubber through Accelerated Aging Tests and Dynamic Mechanical Property Tests. Nonlinear least-squares method is used to identify the parameters of the established rubber viscoelastic constitutive model based on the results of the rubber dynamic mechanical property tests. Based on the three-dimensional dynamic stiffness calculation method of V-shaped rubber damping elements, combined with the Arrhenius equation and the variation law of viscoelastic dynamic mechanical parameters of rubber elements with time, a thermal oxygen aging performance evolution model of V-shaped rubber vibration damping elements is established. A rigid-flexible coupled dynamics model of high-speed trains is established, and the dynamic mechanical property parameters of the body and the underfloor equipment suspended by damping components are set based on the established thermal-oxidative aging performance evolution model of rubber damping components. The influence of external environmental temperature, excitation frequency, and thermal-oxidative aging on the coupled vibration between the train body and underfloor equipment is investigated. The results show that rubber aging significantly exacerbates the coupled vibration of the train body and underfloor equipment. Rubber aging mainly affects the peak value of the main frequency near the first-order vertical bending frequency, and as the rubber ages, changes in vibration energy distribution and frequency shift of the main vibration frequency occur. With the increase in service life, the vertical Sperling stability index of the train shows a gradual increase. The research results can provide reference for the engineering application of rubber vibration isolation components in high-speed trains.

Key words: high-speed trains, rubber damping elements, thermal oxygen aging, aging performance prediction, coupled vibration

CLC Number:

U270

DENG Xin, GONG Dao. Investigation into Influence of Thermal-oxidative Aging of Rubber Damping Components on Coupled Vibration between High-speed Train Body and Under Classis Equipment[J]. Journal of Mechanical Engineering, 2025, 61(20): 182-193.

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