Studies On The Vibration Characteristics Of High Temperature Superconducting Maglev Vehicles On A Ring Test Line

High temperature superconducting maglev is a kind of levitation method with the characteristics of levitation-oriented integration and self-stable without sources. It has the advantages of lower noise, energy efficiency, and it has been widely used in rail transport, bearing and flywheel energy storage areas.At present, countries around the world have invested much in the technology research, but the studies on dynamics of high-temperature Superconducting Maglev vehicle has just started. Dynamic characteristic is also an important scientific question for high temperature superconducting maglev vehicle especially in a short distance test line. For this purpose, the paper firstly studied the free vibration characteristics of Dewar, bogies and the vehicle under different field cooling heights. Dewar and bogies are critical components of the high temperature superconducting maglev test vehicle. The variation of natural frequency in horizontal and vertical direction under different conditions is concluded. Based on this the vibration characteristics of the HTS Maglev in the existing loop line is measured and the effect of FCHs, load, speed on the dynamic characteristics of the HTS Maglev testing vehicle is further studied.Following this the vibration characteristics of the HTS Maglev testing vehicle in straight line and curve segments of the existing loop line are compared. The vibration characteristics of Dewar and bogies were given much attention. Security, stationarity of the maglev was determined referring to the traditional method of vehicle dynamics.Lastly, based on above research, to improve the vibration characteristics of high temperature superconducting maglev vehicle, the paper proposed two feasible methods:(1) Join transition curve to optimize vibration characteristics of high temperature superconducting maglev, and reduce vibration of the body from straight line to curves; (2) Set initial eccentric distances to improve guiding performance of high temperature superconducting maglev, then make the vehicle go through the curves preferably.