Influence of Temperature Variation on High Frequency Vibration Transmission Characteristics of Primary Hydraulic Damper of High-Speed Train Bogie

Abstract

In this paper, the influence of temperature change on the high frequency vibration transmission characteristics of the primary hydraulic damper of bogie is analyzed through the laboratory test of the dynamic stiffness characteristics of the primary hydraulic damper at different temperatures and the simulation prediction of the high frequency vibration transmission characteristics. The results show that with the temperature decreasing, the peak frequency of the overall frequency response function of the damper obviously shifts to the high frequency, but the peak value of the frequency response function gradually decreases above -10℃ and increases below- 10℃. Since the damper contains both oil and rubber, the test results are influenced by the temperature change characteristics of rubber and oil. Based on the above test results, with the decrease of temperature, the dynamic stiffness of rubber joint and oil increases gradually; before -10℃, rubber joint is the dominant factor of temperature change characteristics of damper; after -10℃, the structural characteristics of oil inside damper are the dominant factor of temperature change characteristics of damper. This study provides reference and basis for the design of vibration reduction and noise reduction of high-speed train bogies under the condition of large temperature difference.