Experimental and numerical investigations of the dynamic responses of low and medium speed maglev train-track-bridge coupled system

Li, Miao; Luo, Shan; Ma, Wei; Li, Tie; Gao, Dinggang; Zhou, Xu

doi:10.1080/00423114.2020.1864417

Cited by 27 publications

(7 citation statements)

References 33 publications

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“…These models have been used to investigate more complicated dynamic interactions of maglev systems including the effects of irregularities [17,19], resonant conditions [15], ground settlement [23] and cross-wind loads [24]. Field experiments [25][26][27][28][29][30][31] were also conducted to investigate the dynamic response of maglev vehicles running on a bridge. The data from the field experiments subsequently enabled the established numerical model to be verified and used to predict the system response.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Performance of Low- and Medium-Speed Maglev Train Running on the Turnout

Wang¹,

Zhu²,

Ni³

et al. 2023

MITS

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This study aimed to analyze dynamic performance of the low-and medium-speed maglev train on the turnout, by conducting a series of field tests on the Fenghuang maglev sightseeing express line. This study systematically analyzed and evaluated dynamic responses of vehicle body, suspension bogie, short rail joint, motor-driven long-span girder (LSG) and continuous beam of the turnout at different speeds and loads in time and frequency domains. Test results obtained in this study indicated that: 1) speed and load of the maglev train affected acceleration amplitude of the train and turnout; 2) vertical sperling indexes of the test train were less than 2.5, indicating that the train had good ride quality; and 3) resonance phenomenon of track occurred at 40 km/h. The findings of this study may serve as references for model validation and optimized design of low-and mediumspeed maglev train.

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Section: Introductionmentioning

confidence: 99%

Dynamic Performance of Low- and Medium-Speed Maglev Train Running on the Turnout

Wang¹,

Zhu²,

Ni³

et al. 2023

MITS

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“…In the experiment research, Liu et al (2021) presents the mechanisms for the abnormal vibration of newly developed medium-speed maglev test trains based on field tests with various speeds. Li et al (2021Li et al ( , 2022 tested the dynamic characteristics of the LMS maglev vehicle, track and bridge when the train standing still on the beam. Feng et al (2023) tested the dynamic responses of the maglev train 1 and simply-supported girder in Changsha Maglev Express with a running speed of 80-140 km/h.…”

Section: Introductionmentioning

confidence: 99%

Research on vibration mechanism of the low-to-medium-speed maglev train-track-at-ground-structure system

Wang

2023

Advances in Structural Engineering

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The at-ground-structure supports the maglev track on the subgrade segment and receives the subgrade’s equally distributed elastic support to ensure the holding track running of the maglev train. A complicated maglev train-track-at-ground-structure coupled system is produced, negatively affecting the stable operation of the train. To explore the vibration mechanism, an elaborate maglev train-track-at-ground-structure coupled system was established considering active levitation control, and field tests confirmed the reliability of the numerical method. Firstly, the natural frequencies of track-at-ground-structure were investigated. Then, characteristics of this coupled system were examined in terms of its dynamic interaction mechanism, dynamic response characteristics and vibration frequency spectrum distribution. Finally, the vehicle-induced resonance mechanism and anti-vibration methods of the at-ground-structure were analyzed. The results show that the high-frequency vibrations exist in both the F-rail and at-ground-structure obviously, and create varied wavelengths affecting the maglev train’s running stability. The high frequency resonance phenomena easily produce when loading frequency of neighboring levitation forces is near to fundamental frequency of at-ground-structure, and disappears while the two frequencies are avoided.

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“…Therefore, some researchers analyzed the dynamic performance of maglev train from the field test results by testing the operation state of maglev train on the line. Li et al 13 set up a low-medium speed train with a central air spring suspension frame, studied the dynamic features of the vehicle-rail-bridge coupling system, and conducted field tests on the coupling system in the speed range of 60 km/h to study its natural vibration characteristics. Underlying field measurement and model real-time update method, Zhang and Huang 14 presumed an interaction model of maglev vehicle/guideway, and dissected what impacts distributed magnetic forces and irregularity might impose on the interaction system.…”

Section: Introductionmentioning

confidence: 99%

Field experimental tests and analyses of suspension frame vibration of low-medium speed maglev train

Liao

et al. 2022

Journal of Low Frequency Noise, Vibration and Active Control

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Pushed by social demands, China has continuously developed its low-medium speed maglev transportation systems in recent decades. However, with the increase of the running mileage of the train, high frequency vibration of suspension frame gradually appears. In this paper, a method to analyze the high frequency vibration of suspension frame by detecting the current of traction motor is proposed. Field measurements of suspension frame vibration and traction motor current of low-medium maglev train were conducted on a maglev line that has been commercially put into operation. The test results show that the speed of the measured maglev train was closely correlated with vibration accelerations of the suspension frame in three directions, but as the speed increased, the influence it imposed on the suspension frame vibration waned. The dominant frequency of traction motor resultant current was consistent with the dominant frequency of the suspension frame vibration acceleration. The switching frequency of traction inverter was the main cause of high frequency vibration of suspension frame.

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Experimental and numerical investigations of the dynamic responses of low and medium speed maglev train-track-bridge coupled system

Cited by 27 publications

References 33 publications

Dynamic Performance of Low- and Medium-Speed Maglev Train Running on the Turnout

Dynamic Performance of Low- and Medium-Speed Maglev Train Running on the Turnout

Research on vibration mechanism of the low-to-medium-speed maglev train-track-at-ground-structure system

Field experimental tests and analyses of suspension frame vibration of low-medium speed maglev train

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