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非线性接触下磁悬浮电机柔性转子系统模态分析

DOI: 10.13334/j.0258-8013.pcsee.2014.15.014, PP. 2438-2444

Keywords: 高速磁悬浮电机,柔性转子,接触刚度,弹簧刚度,模态分析

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Abstract:

针对磁悬浮电机转子系统模态分析误差较大的问题,提出考虑转子组件间的非线性接触行为,基于罚函数方法通过修正优化接触刚度因子实现对电机柔性转子系统模态的精确分析。通过建立弹性支承转子-轴承系统有限元分析模型,得到了在不同的支承刚度下转子系统前10阶固有频率的仿真值及变化规律。进行模态测试实验验证,结果表明仿真分析和测试值吻合较好,并对加动平衡环后的转子系统进行固有频率的仿真,其结果的准确性在试验样机穿越临界转速时得到了验证。

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