Simulation and stress analysis of large capacity composite flywheel rotor

doi:10.19799/j.cnki.2095-4239.2022.0609

Abstract

Abstract:

Large capacity power flywheel energy storage system is the high-quality frequency modulation resource of the power system. The primary technique for enhancing flywheel energy storage is the use of high-strength and low-density composite material to create flywheel rotors. In this study, the large-size composite flywheel rotor is taken as the object. Based on the elastic theory, the stress distribution formula of the anisotropic material rotor rim under high-speed rotation is obtained. The interference fit between the composite rim and the metal hub's stress analysis formula is obtained based on the principle of stress superposition, and an analytical solution is provided. Then the finite element analysis model of interference fit between the composite rim and metal hub is established, and the stress distribution of the rotor is simulated and analyzed. The simulation results are consistent with the analytical results, which confirm the rationality of the model. Finally, the impact of interference on the stress of the contact surface between the metal hub and the composite rotor rim as well as the impact of the flywheel rotor's deformation at a specific speed are investigated.

Key words: composite materials, flywheel rotor, analytical model, finite element analysis, stress distribution

CLC Number:

TK 02

Zezheng WANG, Wenhao QU, Yajun WANG, Run QIN, Yibing LIU. Simulation and stress analysis of large capacity composite flywheel rotor[J]. Energy Storage Science and Technology, 2023, 12(3): 669-675.

Figures/Tables 9

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性能参数	型号及数值
复合材料型号	CF-T700
基体	环氧树脂
环向弹性模量E_θ/GPa	150.7
径向弹性模量E_r/GPa	7
环向泊松比ν_θr	0.3
径向泊松比ν_rθ	0.36
环向剪切模量/GPa	5.5
径向剪切模量/GPa	4.9
密度ρ/(kg/m³)	1590
环向拉伸强度/MPa	3200
径向拉伸强度/MPa	80

性能参数	型号及数值
材料型号	铝合金7075
拉伸强度/MPa	524
弹性模量/GPa	71
密度/(kg/m³)	2810
比强度/(×10⁶ m²/s²)	0.213

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