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储能飞轮提高储能密度的关键是提高飞轮转子的线速度 ,为了充分利用端盖材料高强度铝合金的性能 ,强度设计中引入弹塑性设计思想 ,建立了具有几何非线性的有限元弹塑性计算模型 ,提出分段线性化模拟材料非线性的算法。进行了端盖受轴向压力的力学实验 ,和计算结果作了比较。端盖的整体变形和弹塑性计算结果相当符合 ,端盖的破坏载荷大大超过弹性计算的结果。结果表明应用弹塑性计算进行端盖的强度设计是可行的 ,可以明显提高端盖的破坏极限 ,为飞轮端盖的强度设计和结构优化提供了重要方法
The key of energy storage flywheel to improve energy storage density is to increase the linear velocity of flywheel rotor. In order to make full use of the performance of high strength aluminum alloy with end cap material, the elasto-plastic design idea is introduced into the strength design and the finite element elasto-plasticity The model was calculated and a piecewise linearized algorithm to simulate material nonlinearity was proposed. The mechanical experiment of axial pressure on the end cap was carried out, and the calculation results were compared. The overall deformation of the end cap and the elastoplastic calculation result are in good agreement. The damage load of the end cap greatly exceeds the result of elastic calculation. The results show that it is feasible to design the strength of the end cap by using the elastoplastic calculation, which can obviously increase the destructive limit of the end cap and provide an important method for the strength design and structural optimization of the flywheel end cap