Study on Damage, Equivalent Stress and Life Distribution Characteristics of Bogie Frame of High-speed Train

doi:10.3901/JME.2020.22.237

Abstract

Abstract: In order to analyze the damage, equivalent stress and life distribution characteristics of bogie frame of high-speed train, the dynamic stress railway line measurement of the key fatigue points of frame is carried out and the time-domain data waveforms of the measured points are analyzed. Based on the measured stress time history and rain flow counting method, the two-dimensional stress spectrum is compiled, and the two-dimensional stress spectrum is transformed into one-dimensional stress spectrum by using the Goodman equal life equation. The establishment methods of linear cumulative damage model and nonlinear cumulative damage model are described. The linear cumulative damage and nonlinear cumulative damage of measured data are calculated and compared. Based on the linear cumulative damage theory and the nonlinear cumulative damage theory, the equivalent stresses under each theory are deduced, and the two equivalent stresses are calculated and compared based on the①measured data. The fatigue life of frame structure is compared and analyzed by combining the equivalent stress calculated by nonlinear cumulative damage theory and linear cumulative damage theory, and by calculating and comparing the fatigue life of the frame structure under different reliability. Compared with the nonlinear fatigue analysis theory, the linear fatigue analysis theory is conservative in evaluating the fatigue characteristics of high-speed train bogie frame.

Key words: vehicle engineering, stress spectrum, linear cumulative damage, nonlinear cumulative damage, equivalent stress, fatigue life

CLC Number:

U270

CHEN Daoyun, WANG Binjie, XIAO Qian, LI Qiang, SUN Shouguang. Study on Damage, Equivalent Stress and Life Distribution Characteristics of Bogie Frame of High-speed Train[J]. Journal of Mechanical Engineering, 2020, 56(22): 237-246.

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