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The damping effect of magnetorheological elastomers on dynamic absorber for powertrain vibration reduction

Conference Paper


Abstract


  • The effect of damping of magnetorheological elastomer (MRE) on effectiveness of

    Adaptive Tuned Vibration Absorber (ATVA) for vehicle powertrain torsional steady

    vibration reduction is presented in this study. The MRE used to develop the ATVA

    is a soft MRE with a significant MR effect (the increase in elastic modulus is about

    100 times). Thus, the ATVA can work in a wide frequency bandwidth. Several

    damping models were used for the soft MRE to estimate and compare the ATVA

    effectiveness for vibration reduction of a powertrain which is modeled as a

    four-degree-of-freedom system. Also, approximated formulas for both shear

    modulus and damping are proposed for ATVA design and they are in agreement

    with experiment data. The numerical simulations of the powertrain system fitted

    with the ATVA are carried out for these damping models. The obtained results show

    that at the resonant frequency the less MRE damping ratio is the higher ATVA

    effectiveness could be. However, the results also indicate that a low damping ratio

    may result in high vibration responses at the two new invariant frequencies which

    are introduced after adding the ATVA to the powertrain system. Furthermore, the

    results showed that it is different from traditional absorbers for tuning ATVA

    damping ratio and stiffness coefficient because for ATVA using MREs when either

    stiffness or damping coefficient is tuned, the other one will be set automatically as

    well. This result will be useful for choosing an optimal MRE material for

    constructing a smart ATVA for powertrain vibration reduction.

Authors


  •   Hoang, Nga (external author)
  •   Zhang, Nong (external author)
  •   Du, Haiping

Publication Date


  • 2009

Citation


  • N. Hoang, N. Zhang & H. Du, "The damping effect of magnetorheological elastomers on dynamic absorber for powertrain vibration reduction," in 13th Asia Pacific Vibration Conference, 2009,

Abstract


  • The effect of damping of magnetorheological elastomer (MRE) on effectiveness of

    Adaptive Tuned Vibration Absorber (ATVA) for vehicle powertrain torsional steady

    vibration reduction is presented in this study. The MRE used to develop the ATVA

    is a soft MRE with a significant MR effect (the increase in elastic modulus is about

    100 times). Thus, the ATVA can work in a wide frequency bandwidth. Several

    damping models were used for the soft MRE to estimate and compare the ATVA

    effectiveness for vibration reduction of a powertrain which is modeled as a

    four-degree-of-freedom system. Also, approximated formulas for both shear

    modulus and damping are proposed for ATVA design and they are in agreement

    with experiment data. The numerical simulations of the powertrain system fitted

    with the ATVA are carried out for these damping models. The obtained results show

    that at the resonant frequency the less MRE damping ratio is the higher ATVA

    effectiveness could be. However, the results also indicate that a low damping ratio

    may result in high vibration responses at the two new invariant frequencies which

    are introduced after adding the ATVA to the powertrain system. Furthermore, the

    results showed that it is different from traditional absorbers for tuning ATVA

    damping ratio and stiffness coefficient because for ATVA using MREs when either

    stiffness or damping coefficient is tuned, the other one will be set automatically as

    well. This result will be useful for choosing an optimal MRE material for

    constructing a smart ATVA for powertrain vibration reduction.

Authors


  •   Hoang, Nga (external author)
  •   Zhang, Nong (external author)
  •   Du, Haiping

Publication Date


  • 2009

Citation


  • N. Hoang, N. Zhang & H. Du, "The damping effect of magnetorheological elastomers on dynamic absorber for powertrain vibration reduction," in 13th Asia Pacific Vibration Conference, 2009,