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  • Research of crack detection and delay crack propagation on a nonlinear rotor
    Liu, Jun, strojnik ; Liu, Weilong ; Wang, Xiaofeng
    The existence and propagation of a crack on an engineʼs nonlinear rotor can easily cause a serious accident, so it is quite essential to detect a crack in the rotor system through analysis of the ... rotorʼs vibration signals and to delay the crack propagation. The vibration signals of the cracked rotor show the non-periodic and the nonlinearity within a transient response. The fault characteristics of the crack can be easily hidden in other vibrational components and are difficult to extract from transient signals. In the paper, the Hilbert-Huang marginal spectrum (HHMS) method is proposed to realize the extraction of crackʼs fault characteristics in a nonlinear rotor system. In addition, the crackʼs opening and closing degrees at any rotating position are also put forward representing the crack propagation, and some tactics of the delaying crack propagation are proposed based on the effect on the crackʼs opening and closing degree caused by the change of different rotor parameters. The simulation results show that the HHMS method can detect a crack early at about five per cent of the depth of the rotorʼs diameter, and the methods of delaying crack propagation can effectively delay propagation. Experimental results verify the effectiveness of the proposed HHMS method.
    Vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 64, nr. 10, Oct. 2018, str. 601-610)
    Vrsta gradiva - članek, sestavni del
    Leto - 2018
    Jezik - angleški
    COBISS.SI-ID - 16263451

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    Digitalna knjižnica Slovenije - dLib.si
    DOI

Vnos na polico