Theoretical research and experimental validation of quasi-static load spectra on bogie frame structures of high-speed trains

Zhu, Ning; Sun, Shouguang; Li, Qiang; Zou, Hua

doi:10.1007/s10409-014-0117-7

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…When the vehicle passed an S-shaped curve with a radius of 450 m and a high-level track irregularity, the time histories of the vertical load between the wheel and rail, the vertical and lateral loads of the air spring, the lateral stop and damper loads, and the twist load experienced by the bogie frame were calculated according to the method proposed by Zhu. 15 For the metro bogie frame as shown in Figure 4, it mainly bears the vertical and lateral loads of the air spring, the bump stop load, the damper load and the torsional load. Figures 5-9 show the time history of each load.…”

Section: Bogie Frame Characteristics Under Random Loadmentioning

confidence: 99%

Fatigue strength analysis of bogie frames under random loads

Hua

Li³

et al. 2019

Advances in Mechanical Engineering

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In this study, a method for analyzing the fatigue strength of a bogie frame under a random load was proposed. Based on the geometric features, a welded joint coordinate system was established to compute the stress components of each node in this coordinate system. With the influence of small amplitude cycles included, based on the corrected S–N curve and a method for calculating the equivalent constant amplitude stress, the node and comprehensive degree of utilization were calculated based on the anti-fatigue design grade of welded joints to evaluate the fatigue strength of a structure under a given lifespan. The FKM and International Institute of Welding methods were used to evaluate the fatigue strength of typical welded joints of a bogie frame. The characteristics of the node degree of utilization under different analytical methods were compared, and the results showed that when the time histories of the three stress components of the nodes had significant non-proportional features, the FKM method obtained conservative results. When the time histories of the three stress components of the nodes were synchronized, the criterion value specified by the International Institute of Welding method was the main factor affecting the distribution characteristics of the node degree of utilization. The analysis based on the International Institute of Welding method can effectively balance the lightweight design and reliability of the structure.

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Section: Bogie Frame Characteristics Under Random Loadmentioning

confidence: 99%

Fatigue strength analysis of bogie frames under random loads

Hua

Li³

et al. 2019

Advances in Mechanical Engineering

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“…By use of a reliable test technology, Ren et al [15] tested the axle spring forces of the high speed EMU on the Beijing-Tianjin railway line. Zhu et al [16] carried out theoretical research and experimental validation to investigate load spectra of high-speed trains bogie frames. Wu et al [17] investigated the post-derailment dynamic behavior of the half car and verified the proposed postderailment dynamic model.…”

Section: Introductionmentioning

confidence: 99%

Methodology to Evaluate Fatigue Damage of High-Speed Train Welded Bogie Frames Based on On-Track Dynamic Stress Test Data

Yang

Wang

et al. 2019

Chin. J. Mech. Eng.

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The current method of estimating the fatigue life of railway structures is to calculating the equivalent stress amplitude based on the measured stress data. However, the random of the measured data is not considered. In this paper, a new method was established to compute the equivalent stress amplitude to evaluate the fatigue damage based on the measurable randomness, since the equivalent stress is the key parameter for assessment of structure fatigue life and load derivation. The equivalent stress amplitude of a high-speed train welded bogie frame was found to obey normal distribution under uniform operation route that verified by on-track dynamic stress data, and the proposed model is, in effect, an improved version of the mathematical model used to calculate the equivalent stress amplitude. The data of a long-term, on-track dynamic stress test program was analyzed to find that the normal distribution parameters of equivalent stress amplitude values differ across different operation route. Thus, the fatigue damage of the high-speed train welded bogie frame can be evaluated by the proposed method if the running schedule of the train is known a priori. The results also showed that the equivalent stress amplitude of the region connected to the power system is more random than in other regions of the bogie frame.

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“…The study of load spectrum is the hotspot of the current bogie frame research [1][2][3]. How to obtain the load spectrum of the bogie frame, there are many researchers have done a lot of work.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Load-Stress Response Characteristics of the Bogie Frame in Intercity Electric Multiple Unit

Zou

Sun

et al. 2018

Chin. J. Mech. Eng.

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Load spectra research for bogie frame requires establishing the load-stress relationship on working condition, which has been omitted by the researchers. With the load-stress of the bogie frame of an intercity Electric Multiple Unit (Hereinafter referred to as EMU) as the research object, an optimization model of the load-stress transfer relationship is established. The load-stress coefficient for EMU bogie frame was calibrated in the laboratory bench and online test was arranged on Dazhou-Chengdu line. Comparison of nonlinear and linear neural networks proves that the linear transitive relation between the load and stress of the bogie frame in the operating process is highly suitable. An optimization model of the load-stress transfer coefficient is obtained. The data calculated with the modified coefficient are closer to the dynamic stress results in the actual operating process than the data calculated with the calibration coefficient. The coefficient of the modified transitive relation is unaffected by operating area, empty load, heavy load, or other conditions in the operating process of the intercity EMU. The real loads in actual situations are obtained. The model of online load-stress relationship that is highly suitable for line stress calculation is finally established. The research is helpful for further damage calculation and inferring the time history signal of the load in load spectra research.

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Theoretical research and experimental validation of quasi-static load spectra on bogie frame structures of high-speed trains

Cited by 20 publications

References 19 publications

Fatigue strength analysis of bogie frames under random loads

Fatigue strength analysis of bogie frames under random loads

Methodology to Evaluate Fatigue Damage of High-Speed Train Welded Bogie Frames Based on On-Track Dynamic Stress Test Data

Analysis of the Load-Stress Response Characteristics of the Bogie Frame in Intercity Electric Multiple Unit

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