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Composite flywheel for energy storage structural mechanics and energy storage research

Author: JiaHongYu
Tutor: LiCheng
School: Zhengzhou University
Course: Mechanical Manufacturing and Automation
Keywords: Carbon fiber composite materials Flywheel Stress Numerical Simulation Energy storage density
CLC: TH133.7
Type: Master's thesis
Year: 2009
Downloads: 109
Quote: 0
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Abstract


Flywheel energy storage is an effective way to solve the energy shortage . Since the current use of many non-renewable energy sources , making unremitting efforts to increase the utilization rate , the researchers in this field worldwide , and has a variety of energy storage to take advantage of . But traditional storage methods utilization is not high , the complexity of the process of energy conversion , as a green energy storage flywheel energy storage can be an effective solution to this problem . Carefully review the basis of a large number of domestic and foreign literature , for weeks to wound carbon fiber composite flywheel rotor overall stress level , energy storage density and speed factors summarized and analyzed , and get the optimized flywheel energy storage system significance of the conclusions . Mechanics basics and finite element analysis method to derive the the flywheel rotor stress-strain analytical formula , combined with the results of numerical simulation of the ANSYS software to verify the accuracy of the analytic expression , the error is floating in a very small range ; chosen three common wheel material , respectively wheel rim stress compare the three materials supplemented with the same speed , radial and circumferential stress analysis to determine the aluminum alloy is more appropriate to reduce the flywheel overall stress level and optimize the energy storage density ; different mold for flywheel materials than on the flywheel obtained the flywheel inside and outside radius than the principle of selecting ; practical example as a basis for analysis , to be optimized flywheel energy storage density structure and material factors proposed match with optimized design method to meet the composite material strength criterion requirements . When optimizing stored energy in the flywheel energy storage system , failure of the rotor need to be predicted and used to determine the largest possible flywheel speed . Were selected to both domestic and overseas carbon fiber / epoxy composite material , the use of optimized the flywheel rotor size parameters , using ANSYS finite element analysis software to establish flywheel rotor model , extracted along the radial direction of radial stress , hoop stress and shear shear stress , combined with the corresponding strength of the material , calculate the failure criteria of convergence , under which determine the maximum rotational speed of the flywheel rotor , the flywheel will not work in a state overload failure occurs , the results show that the ANSYS finite Element rotor model can better for rotor failure mechanism analysis .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Flywheel
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