针对基础运动的飞轮储能转子动力学问题展开研究,将飞轮转子等效为Timoshenko梁单元模型,通过坐标变换建立基础运动的转子动力学有限元模型,研究基础在规则运动时的动力学特性,得到以下结论：基础运动参数的增大会加剧固有频率分离并改变临界转速。转子稳态响应频谱中会出现基础运动的频率成分,幅值随基础运动频率、幅值的增大而增大;基础转动频率接近临界转速对应的频率时会产生共振,稳态频谱中基础运动频率成分出现峰值,瞬态升速响应出现额外共振峰。转子设计和应用时应考虑基础运动的影响。
Abstract
When the flywheel energy storage system runs in complex environment, the foundation will be affected by the environment to produce a complex motion state, which will bring additional excitation and affect the rotor motion state. In this paper, the dynamic problem of flywheel energy storage rotor with foundation motion is studied. First, the flywheel rotor is equivalent to Timoshenko beam element model, and the finite element dynamic model with foundation motion is established by coordinate transformation. The dynamic characteristics of the rotor with foundation in regular motion are studied. The following conclusions are drawn： the increase of the foundation motion parameters will enlarge the natural frequency separation and change the critical speeds. The frequency component of the foundation motion appears in the steady-state response spectrum of the rotor, and the amplitude increases with the increase of the frequency and amplitude of the foundation motion. When the frequency of the foundation motion is close to the frequency corresponding to the critical speed, the resonance will be caused, the peak of the foundation motion frequency component will appear in the steady state spectrum, and additional formant will appear in the transient acceleration response. The influence of foundation motion should be considered in rotor design and application.
关键词
储能 /
飞轮 /
基础 /
共振 /
动力学响应 /
梁单元 /
固有频率
Key words
flywheels /
energy storage /
foundations /
resonance /
dynamic response /
beam element /
natural frequencies
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基金
电力系统用大容量飞轮储能成套系统研究项目（0309-NJKG-技开-2023-0032）
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