Modal analysis of the wheelspoke shaped composite material flywheel
LI Hongyan, XV Tao, LI Dongyue
（School of Mathematics and Physics, Qingdao University of Science & Technology, Qingdao 266061, China)
 

Abstract: Aiming at the vibration problem of the wheelspoke shaped composite material flywheel, the stiffness matrix of the initial stress structure was derived according to the nonlinear finite element theory, and the characteristic equation was obtained furthermore. For the carbon fiber composite flywheel rim, the initial stress was applied to which with different size and distribution respectively. Modal analysis was simulated using finite element method, natural frequency of the composite material flywheel was summarized with initial stress changing. The analytical results indicate that the natural frequency can meet the design equipment, the first natural frequency decreases obviously, while there is no significant change for the higher natural frequency. Influence of initial stress size and distribution should be considered for further optimum design.
Key words: wheelspoke shaped; composite material; flywheel; modal