电磁场下颗粒阻尼动态特性试验研究

发布时间：2018-02-10 03:33

本文关键词： 电磁颗粒阻尼器损耗功率损耗因子有效质量　出处：《振动与冲击》2017年04期 　论文类型：期刊论文

【摘要】：利用稳态能量流法对直流电磁场作用下颗粒阻尼器的阻尼特性进行了试验研究。试验结果表明:在一定振动情况下,通过施加直流电磁场的方法,可以改变颗粒阻尼器阻尼性能;在较低振动加速度幅值(32.5 m/s~2)下,颗粒体产生的损耗功率和损耗因子随电流强度的增强而减小;当振动加速度增大到32.5 m/s~2后,损耗功率和损耗因子会随电流强度的增强而增大。阻尼颗粒的有效质量随激励幅值的增加呈先平缓再降低的趋势,且电流强度的变化对有效质量影响较小。
[Abstract]:The damping characteristics of particle dampers under the action of DC electromagnetic field are experimentally studied by using the steady-state energy flow method. The experimental results show that under certain vibration conditions, the direct current magnetic field is applied to the dampers. The damping performance of the particle damper can be changed, and the loss power and loss factor of the particle body decrease with the increase of the current intensity at a lower vibration acceleration amplitude of 32.5 m / s, and when the vibration acceleration increases to 32.5 m / s ~ (2), the loss power and loss factor decrease with the increase of the current intensity, and when the vibration acceleration increases to 32.5 m / s ~ (2), The loss power and loss factor will increase with the increase of the current intensity, and the effective mass of damping particles will decrease slowly with the increase of excitation amplitude, and the change of current intensity will have little effect on the effective mass.
【作者单位】：武汉科技大学汽车与交通工程学院;东风商用车有限公司技术中心;
【基金】：国家自然科学基金资助项目(51105283)
【分类号】：TB535.1

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