Stiffness of Coupling Connection and Bearing Support for High-Speed Maglev Guideways
Publication: Journal of Bridge Engineering
Volume 23, Issue 9
Abstract
Coupling connections and bearing supports have been widely used in high-speed maglev guideways. Accurate identification of their mechanical properties is necessary for guideway design and research. This paper presents an approach to estimate the rotational stiffness of the coupling connection and the vertical stiffness of the bearing support of maglev guideways. First, the dynamic properties of the guideway were identified from the measured data using the operational modal analysis method. Then, a finite-element (FE) model was established to analyze the influence of the stiffnesses on the dynamic performance of the guideway. The practical stiffnesses were estimated by using the presented model-updating method and sensitivity study. The accuracy of this approach was further investigated by a comparison between the predicted and measured guideway responses. Finally, a parametric analysis was conducted to study the effect of the stiffnesses on the dynamic responses of the train-guideway system. The results indicate that the stiffnesses have an important influence on the dynamic responses and considering them in the simulation of the maglev train-guideway system can improve the prediction accuracy. Thus, for the accuracy of the design and research of the maglev guideway, these practical stiffnesses should not be ignored.
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Acknowledgments
This work is sponsored by the National Key Technology R&D program of the 12th Five-Year plan of China (Project 2013BAG19B01). This experiment was performed with the help of Shanghai Maglev Transportation Development Co., Ltd.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 9 • September 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jul 13, 2017
Accepted: Apr 3, 2018
Published online: Jul 10, 2018
Published in print: Sep 1, 2018
Discussion open until: Dec 10, 2018
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