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Resonance Reliability Analysis for Axle Box Bearing of EMU

Volume 15, Number 6, June 2019, pp. 1652-1661
DOI: 10.23940/ijpe.19.06.p16.16521661

Yonghua Lia, Pengpeng Zhib, Bingzhi Chena, and Ziqiang Shengb

aSchool of Locomotive and Rolling Stock Engineering, Dalian Jiaotong University, Dalian, 116028, China
bSchool of Mechanical Engineering Dalian Jiaotong University, Dalian, 116028, China

 

(Submitted on March 26, 2019; Revised on April 20, 2019; Accepted on June 10, 2019)

Abstract:

In order to study the influence of design variables on the resonance reliability of axle box bearings of electric multiple units (EMU), two methods of resonance reliability analysis of axle box bearings are proposed based on fuzzy reliability and probabilistic reliability. The randomness of the elastic modulus, Poisson's ratio, density, and speed of axle box bearings and the fuzziness of the resonance criteria are considered. The fuzzy reliability theory is introduced to analyze the resonance reliability of axle box bearings, and the resonance reliability equation is deduced and combined with the theoretical analysis of bearing vibration. Then, the resonance reliability of axle box bearings based on fuzzy theory is obtained. Based on this, the axle box bearing of EMU is parameterized by APDL language. The resonance reliability analysis of axle box bearings is carried out by using the Monte Carlo simulation (MCS) method based on the frequency interference model. The results show that the discreteness of the design variable and speed of axle box bearings have a negative influence on the resonance reliability of bearings, greatly increase the probability of resonance, and reduce the reliability of bearings. By comparing the results of resonance reliability analysis obtained by the probabilistic design method, the accuracy and practicability of the resonance fuzzy reliability analysis are verified, which provides a theoretical reference for the anti-resonance design of axle box bearings.

 

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