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Development and evaluation of a highly adaptive MRF-based absorber with a large effective frequency range

机译：具有大有效频率范围的高度自适应MRF的吸收器的开发与评价

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摘要

This work developed an MRF-based absorber aiming at using the controllable storage modulus (stiffness) of MRF in its pre-yield region to achieve a wide natural frequency variation range. In the characterization test, its damping and stiffness properties in response to different amplitude and magnetic fields were explored. A sweep frequency test was then conducted to obtain the frequency shift property of the MRF absorber and the testing results demonstrate that its relative change rate of natural frequency is high up to 1986%. A mathematical model was built to predict the resonance shifting performance of the MRF absorber under different currents. Then an evaluation system with a primary mass was built to evaluate the absorber's capability on reducing vibrations. The experimental results under single-frequency excitation show that the MRF absorber has high efficiency in reducing the acceleration of the primary system under the STFT based control. The absorption experiment under the sweeping frequency excitations was also conducted and the results indicate that the absorption point of the absorber can shift its positions as the applied current changes, and that the primary acceleration remains the minimum under the STFT based control. All of the experimental results indicate that the proposed MRF absorber is competent as a vibration reduction device.
机译：这项工作开发了一种基于MRF的吸收体，旨在使用其预屈服区中MRF的可控存储模量（刚度），以实现宽的固有频率变化范围。在表征测试中，探讨了响应于不同幅度和磁场的阻尼和刚度特性。然后进行扫描频率测试以获得MRF吸收器的频移性，并且测试结果表明其自然频率的相对变化率高达1986％。建立了一种数学模型，以预测不同电流下MRF吸收器的共振移位性能。然后建立具有主要质量的评估系统以评估吸收器对减少振动的能力。单频激发下的实验结果表明，MRF吸收剂在基于STFT控制下降低了初级系统的加速度的高效率。还进行了扫描频率激发下的吸收实验，结果表明吸收器的吸收点可以将其位置移位为施加的电流变化，并且初级加速度在基于STF的控制下仍然是最小值。所有实验结果表明，所提出的MRF吸收器与减振装置具有胜任。

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  • 来源
    《Smart Materials & Structures》 |2019年第10期|共10页
  • 作者

    Yang J.; Sun S. S.; Ning D.; Li Z.; Deng L.; Christie M. D.; Du H.; Zhang S. W.; Li W. H.;

  • 作者单位

    Univ Sci &

    Technol China Dept Precis Machinery &

    Precis Instrumentat Anhui Higher Educ Inst Key Lab Precis Sci Instrumentat Hefei 230026 Anhui Peoples R China;

    Univ Wollongong Sch Mech Mat Mechatron &

    Biomed Engn Wollongong NSW 2522 Australia;

    Univ Wollongong Sch Elect Comp &

    Telecommun Engn Wollongong NSW 2522 Australia;

    Univ Wollongong Sch Mech Mat Mechatron &

    Biomed Engn Wollongong NSW 2522 Australia;

    Univ Wollongong Sch Mech Mat Mechatron &

    Biomed Engn Wollongong NSW 2522 Australia;

    Univ Wollongong Sch Mech Mat Mechatron &

    Biomed Engn Wollongong NSW 2522 Australia;

    Univ Wollongong Sch Elect Comp &

    Telecommun Engn Wollongong NSW 2522 Australia;

    Univ Sci &

    Technol China Dept Precis Machinery &

    Precis Instrumentat Anhui Higher Educ Inst Key Lab Precis Sci Instrumentat Hefei 230026 Anhui Peoples R China;

    Univ Wollongong Sch Mech Mat Mechatron &

    Biomed Engn Wollongong NSW 2522 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 智能材料;
  • 关键词

    magnetorheological fluid; variable storage modulus; absorber; vibration reduction;

    机译：磁流变液;可变储层模量;吸收器;减振;

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