Dynamic response analysis of single-span guideway caused by high speed maglev train

Abstract

High speed maglev is one of the most important reformations in the ground transportation systems because of its no physical contact nature. This paper intends to study the dynamic response of the single-span guideway induced by moving maglev train. The dynamic model of the maglev train-guideway system is established. In this model, a maglev train consists of three vehicles and each vehicle is regarded as a multibody system with 34 degrees-of-freedom. The guideway is modeled as a simply supported beam. Considering the motiondependent nature of electromagnetic forces in the maglev system, an iterative approach is presented to compute the dynamic response of a maglev train-guideway system. The histories of the train traversing the guideways are simulated and the dynamic responses of the guideway and the train vehicles are calculated. A field experiment is carried out to verify the results of the analysis. The resonant conditions of single-span guideway are analyzed. The results show that all the dynamic indexes of train-guideway system are far less than permissive values of railway and maglev system, the vertical resonant of guideways caused by periodical excitations of the train will not happen.

Measurements and analysis of track irregularities on high speed maglev lines

“…The cut-off frequency or wavelength of the Butterworth filter plays an important role in the final processing results. Vehicle resonance occurs when the excitation frequency (or wavelength) of irregularities is close to integer multiples of the vehicle natural frequency (Museros and Alarcón, 2005;Shi and Wang, 2011 which may result in vehicle resonance at different speeds are summarized in Table 2. Wavelength increases as speed increases, and if the maximum wavelength is 173 m, almost all wavelengths that affect maglev vehicle vibration can be embodied.…”

Vibration Response Analysis of Simply Supported Box Girder Bridge-Maglev Train in Accelerated Test of Changsha Maglev Express

“…ey established a 5-DOF (degree of freedom) train-rail beam coupling model considering the smoothness of track and proposed the sliding-mode control method based on the Kalman filter to control the dynamic response of suspension system at different given operating speeds [9]. Shi et al established a train-controller-bridge model for the maglev train-bridge system and discussed the effect of train-bridge system parameters and controller model on the dynamic response of the system [10,11]. Kim et al proposed an experimental development of levitation control for highprecision maglev transmission systems carrying OLED displays to monitor and obtain real-time measurement values to manipulate the maglev system [12].…”

Methodological base for the implementation of the magnetic levitation transport technology project in Russia

“…Reduction of the dynamic component on high speeds. A detailed study of these aspects was carried out in [1,2]. The resonance factor of MLTT train is determined to be 1.07; for high-speed trains this value is 3-4 [3,4]…”