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（小于32.5m/s2）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32.5m/s2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 steady state power technique was used to investigate the damping properties of particle damper which was under the effect of electromagnetic field in experiments. It was observed that the electromagnetic field could change the particle damper’s capability of energy dissipation. Under low vibration acceleration (less than 32.5 m/s2), the loss power and the loss factor decrease with current intensity increases. When the acceleration reaches a higher level, the loss power and the loss factor increase as current intensity increases. When the acceleration amplitude increases, effective mass decreases and current intensity hardly has influence on effective mass.
关键词
电磁颗粒阻尼器 /
损耗功率 /
损耗因子 /
有效质量
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Key words
electromagnetic particle damper /
loss power /
loss factor /
effective mass
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