分段刚度双质量飞轮非线性振动特性研究*

doi:10.19562/j.chinasae.qcgc.2019.04.009

Abstract

Abstract: The nonlinear vibration characteristics of the dual mass flywheel with piecewise linear stiffness during torsional vibration are studied in this paper. Firstly, the mathematical model of the dual-mass flywheel piecewise linear system is established. The average method is used to obtain an approximate solution of the system response and the amplitude-frequency characteristic function under the periodic excitation. Then for the actual dual mass flywheel, the influence of each parameter on the amplitude-frequency characteristics is analyzed. Finally, the damping performances of single-stage stiffness and two-stage stiffness dual-mass flywheel under different working conditions are compared and analyzed. The results show that the average method is applicable to the nonlinear vibration analysis of the dual-mass flywheel and the system amplitude-frequency characteristic curve has the characteristics of turning to high frequency at the segment. Nonlinear characteristics can reduce the resonance peak of the system. The simulation results also show that the two-stage stiffness dual-mass flywheel has smaller second mass speed fluctuation and angular acceleration than the single-stage stiffness flywheel under ignition and flameout conditions.

Key words: dual mass flywheel, piecewise stiffness, averaging method, nonlinear vibration

Shi Wenku, Chen Long, Chen Zhiyong , Ding Ji. A Research on Nonlinear Vibration Characteristics of Piecewise Stiffness Dual Mass Flywheel[J].Automotive Engineering, 2019, 41(4): 417-425.

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A Research on Nonlinear Vibration Characteristics of Piecewise Stiffness Dual Mass Flywheel

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