复合材料飞轮结构有限元分析与旋转强度试验

飞轮储能技术是一种机械能量储存方式。储能密度是衡量飞轮储能系统优劣的重要参数,如何提升储能密度,是飞轮储能技术研究的重要内容之一。本文运用ANSYS有限元分析软件对复合材料飞轮转子进行有限元分析,得到不同转速下结构应力与应变的分布,计算得到飞轮理论极限转速为950 r/s,飞轮外缘线速度836 m/s。对飞轮进行高速旋转强度、破坏试验。在试验中,利用电涡流传感器测量轮毂侧壁形变,飞轮形变测量值和理论预计值基本一致。试验飞轮边缘最高线速度达到796 m/s,储能密度达到48 Wh/kg。

Structural Finite Element Analysis and Spin Tests of Energy Storage Flywheel

The technology of flywheel energy storage(FES) is a mechanical way to store energy.Specific energy density(SED) is a significant parameter to evaluate the FES systems,and improving SED is the destination goal of the flywheel research.Structural finite element analysis(FEA) of a composite flywheel rotor was accomplished with the aid of the commercial FEA software ANSYS,which determined the stresses and strains in rotor components caused by rotation and indicated that the maximum theoretical rotational speed was 950 r/s,and the peripheral speed of the rotor was 836 m/s.Two rotors were fabricated and lots of high-speed spin tests were performed.Radial deformation of the rotor rim with respect to rotational speed was measured by eddy current sensors in the tests and the data well matched the FEA result.During the last destructive experiments,the maximum SED of the rotor reaches 48 Wh/kg while the peripheral speed is 796 m/s.