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当真空管道中的气压降到一定值时,其中运行的高温超导磁浮车所受到的空气阻力近似省略。那么磁浮车的运动方向上的动能会因为磁轨道上有接头或其它原因导致轨道上表面磁场的分布不平衡而转移到与运行垂直方向上的振动而损耗掉。对一个已设计好的轨道,其缺陷是不可避免的,文中讨论磁浮车在这种轨道上的动能损耗与磁浮车运行速度的关系。将一定真空环境中运行着的高温超导磁浮车的这种振动近似为弹簧的阻尼振动,然后根据高温超导体的特性及相应测量值来确定其刚度系数与阻尼系数,从而考虑其阻尼振动的动能损耗情况。模拟了三种振动产生方式的耗能情况,与实验结果相符合,表明了能耗规律及其在真空管道运输设计与应用中的参考价值。
When the air pressure in the vacuum pipe drops to a certain value, the air resistance of the high-temperature superconducting magnetic levitation vehicle in operation is almost omitted. Then the kinetic energy of the maglev in the direction of motion will be lost because of the unbalanced distribution of the magnetic field on the upper surface of the track due to the joints in the magnetic track or other reasons and the vibration of the maglev in the direction perpendicular to the operation. The defect of a designed orbit is unavoidable. The paper discusses the relationship between the kinetic energy loss of maglev in this kind of track and the running speed of maglev. The vibration of high-temperature superconducting maglev in a certain vacuum environment is approximated by the damped vibration of the spring, and then the stiffness coefficient and damping coefficient of the high-temperature superconducting magnet are determined according to the characteristics of the high-temperature superconductor and the corresponding measured values so as to consider the kinetic energy of the damped vibration Loss situation. Simulation of the energy consumption of the three vibration modes is consistent with the experimental results, indicating the energy consumption law and its reference value in the design and application of vacuum pipeline transportation.