【摘要】 离相封闭母线(Enclosed Isolated Phase Bus, EIPB)长期工作在振动环境下，其固定装置和弹性结构容易出现松动和老化造成母线外壳与导体不对中，进而导致导体受力不平衡与母线异常振动。首先对离相封闭母线磁场进行分析，揭示不对中产生电动力的机理，其次分析外壳涡流，进而求解导体不对中情况下的电动力，最后将电动力施加到离相封闭母线模型，分析不对中电动力对离相封闭母线振动特性的影响，并结合有限元仿真进行对比验证。结果表明，该方法计算得到的理论值与仿真值基本一致，离相封闭母线在此电动力作用下振幅有明显增加。研究结果对母线不对中情况下的电动力计算提供了一种可行方法，对母线结构设计与异常振动引起的机械故障检测有一定的指导意义。更多还原

【Abstract】 The Enclosed Isolated Phase Bus(EIPB) works in a vibrating environment for a long time, and its fixing device and elastic structure are prone to loosening and aging. It may causes the bus shell and conductor to be misaligned, resulting in unbalanced force on the conductor and abnormal vibration of the EIPB. Firstly, the magnetic field of the EIPB is analyzed to reveal the mechanism of the electrodynamic force generated by misalignment. Secondly, the shell eddy current is analyzed to solve the electrodynamic force under the condition of conductor misalignment. Finally, the electrodynamic force is applied to the EIPB to analyze the influence of misalignment electrodynamic force on the vibration characteristics of the EIPB, and compared and verified with finite element analysis. The results show that the theoretical values calculated by the proposed method are basically consistent with the simulation, and the amplitude of the EIPB increases significantly under this electrodynamic force. This work provide a feasible method for calculating electrodynamic force of EIPB in the case of misalignment, which has certain guiding significance for the design of EIPB structures and the detection of mechanical faults caused by abnormal vibrations.更多还原