高温超导悬浮系统横向稳定性实验研究

项目名称： 高温超导悬浮系统横向稳定性实验研究

项目编号： No.11202089

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 周军

作者单位： 兰州大学

项目金额： 30万元

中文摘要： 自从高温超导材料发现以来，超导块材与永磁体构成的超导悬浮系统在交通运输(超导悬浮列车)和空天飞行器等领域有着广泛应用前景。在该悬浮系统中，悬浮体(永磁体或超导体)以一定间隙稳定悬浮于某一高度处时，不可避免会受到外界干扰而偏离平衡位置。由于超导体中超导屏蔽电流的存在使的偏离平衡位置的悬浮体受到回复力(导向力)作用，导致悬浮体发生以平衡位置为中心的横向振动。振动将产生施加于超导体之上的交变磁场，使超导体内部发生不稳定的磁通运动，宏观上表现为悬浮体中心随时间发生漂移等一系列复杂的、不利于悬浮稳定的非线性动力学现象。本项目针对超导悬浮系统中电磁物理及悬浮体动力运动的非线性耦合问题，开展悬浮系统在横向(水平)外加激励(时变或者脉冲)作用下的悬浮体中心漂移特征，及其对悬浮力、导向力特性的影响等基础课题的基本实验研究，为高温超导悬浮系统的安全性设计提供基本实验研究手段和基础数据。

中文关键词： 高温超导磁悬浮；横向稳定性；动力学；热应力；超导线

英文摘要： Since the discovery of high temperature superconducting (HTS) materials, levitation system consists of bulk HTS and permanent magnet (PM) have good application prospect in the domain of transportation (maglev vehicle) and aerospace craft. In such levitation system, the position of levitated body (PM or HTS) which levitate in the air is sensitive to the external disturbances and will depart from the original equilibrium position under such disturbances. This is inevitable. The intrinsic property that the existing of shielding current provides restoring force (guidance force) make the levitated body oscillate around the equilibrium position laterally. The oscillation will exert AC magnetic field on the HTS and subsequently flux motion in HTS. This will induce some complex, nonlinear dynamics phenomena, such as the position relaxation of levitating body with time and so on, which are harmful for levitating stability. This project aims at the electrical-magnetic-dynamic nonlinear coupling problems in HTS levitation system. We will carry out the testing of levitated body excursion under lateral (horizontal) excitation (time varying or pulse), and subsequently analyze the influence on levitation and lateral forces, and then deal with other basic experimental researches. Our research will provide basic testing techniqu

英文关键词： High temperature superconducting maglev system；lateral stability；dynamics；thermal stress；Superconducting wire