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考虑温度效应的磁流变阻尼器阻尼特性的分析
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国家自然科学基金青年科学基金项目(51805503);北京市自然科学基金面上项目(3202035)


Analysis of Damping Characteristics of Magneto-rheological Damper Considering Temperature Effect
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    摘要:

    磁流变阻尼器属于一种能量耗散装置,在使用过程中将振动机械能转化为自身热能,阻尼器力学性能受磁场和温度等因素的影响。分析磁流变阻尼器的温升特性,建立磁流变阻尼器的宏-微观动力学模型,通过有限元仿真分析阻尼器的温度场分布,理论计算分析磁流变液微观结构对剪切屈服应力的影响、温度和磁场对磁流变液中铁磁颗粒磁化率和磁流变液黏度的影响。试验结果证实:在线圈通有0.5、2 A电流的情况下,当温度从303 K上升至343 K时,阻尼力分别下降了14.5%和10%,当温度上升至383 K时,阻尼器的阻尼力分别下降了20.4%和15.1%,结果表明温度升高,铁磁颗粒磁化率和磁流变液黏度降低,磁场增强,铁磁颗粒磁化率和磁流变液黏度增大。试验结果和理论计算变化趋势一致,磁场的增强补偿了温度升高使磁流变液黏度的减小值,从而减弱了温度对磁流变阻尼器阻尼性能的影响。

    Abstract:

    Magneto-rheological damper is an energy dissipation device,it convertes vibrational mechanical energy into its own thermal energy during using,the mechanical properties of the damper are affected by factors such as magnetic field and temperature.The temperature rise characteristics of the magneto-rheological damper was analyzed,the macro-micro dynamic model of magneto-rheological damper was established.The temperature field distribution of the damper was analyzed by finite element simulation,and the influence of the micro-structure of the magneto-rheological fluid on the shear yield stress was analyzed through theoretical calculations,as well as the influence of temperature and magnetic field on the magnetic susceptibility and viscosity of ferromagnetic particles in magneto-rheological fluid.According to experiment,when the coil has 0.5 A and 2 A current,and the temperature rises from 303 K to 343 K,the damping force drops by 14.5% and 10% respectively; when the temperature rises to 383 K,the damping force of the damper drops by 20.4% and 15.1% respectively.The results show that the temperature increases,the magnetic susceptibility of ferromagnetic particles and the viscosity of magneto-rheological fluid decrease; the magnetic field increases,the magnetic susceptibility of ferromagnetic particles and the viscosity of magnetorheological fluid increase.The experimental results are consistent with the theoretical calculation.The increase of the magnetic field compensates for the decrease of the viscosity of the magneto-rheological fluid caused by the increase of temperature,therefore,the influence of temperature on the damping performance of the magneto-rheological damper is weakened.

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甄亮,冯永保,韩小霞,李淑智,张振华.考虑温度效应的磁流变阻尼器阻尼特性的分析[J].机床与液压,2023,51(5):96-104.
ZHEN Liang, FENG Yongbao, HAN Xiaoxia, LI Shuzhi, ZHANG Zhenhua. Analysis of Damping Characteristics of Magneto-rheological Damper Considering Temperature Effect[J]. Machine Tool & Hydraulics,2023,51(5):96-104

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  • 在线发布日期: 2023-04-07
  • 出版日期: 2023-03-15