基于有限元的飞轮电池转子系统振动分析与结构优化

Vibration Analysis and Structure Optimization of Flywheel Battery Based on Finite Element

由于飞轮电池最大储能密度与转子转速成二次方关系,且飞轮电池转子高速旋转时受不平衡力和陀螺效应影响,会产生复杂的动力学行为。本文对飞轮电池进行振动分析和结构优化。利用CATIA软件对飞轮电池转子进行三维建模。将磁轴承简化为弹性支撑,在Workbench软件中进行模态分析。基于不平衡力影响,在转轴末端施加不平衡力进行谐响应分析,验证了模态分析的仿真结果。以降低转子表面最大变形量为目标,在Workbench中使用响应曲面优化分析工具,对转子外环的宽度和高度,轮毂的宽度和半径进行优化设计。通过仿真验证优化飞轮电池转子结构使得其储能能力显著提高。

The energy density of the flywheel battery is quadratic with the rotor speed. At high speeds,the flywheel rotor system is affected by unbalanced force and gyro effect,which aggravates the instability. Vibration analysis and structural optimization are required. In CATIA,three-dimensional modeling of the car flywheel battery was carried out. Magnetic bearing is simplified into elastic support and the modal analysis is performed in Workbench software. Based on the influence of unbalanced force,the unbalanced force is applied at the end of the shaft to analyze the harmonic response. With the goal of reducing the maximum deformation of the rotor surface,the response surface optimization analysis tool is used in Workbench to optimize the design of the width and height of the rotor outer ring and the width and radius of the hub. The optimization of the rotor structure of the flywheel battery through simulation verified that its energy storage capacity was significantly improved.