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中文摘要：
为了解决磁流变流体沉淀给磁流变流体装置动力特性带来的影响,提出一类流变特性也可以随外加磁场发生显著变化的磁流变脂,基于剪切工作原理设计用于旋转机械转子系统的剪切型磁流变脂阻尼器及单盘悬臂转子系统,通过试验详细地研究剪切型磁流变脂阻尼器对转子系统动力特性的可控性、剪切型磁流变脂阻尼器抑制转子系统振动的有效性,以及剪切型磁流变脂阻尼器对转子系统的振动进行主动控制的适用性,并考察了剪切型磁流变脂阻尼器-转子系统的动力特性在长时间内的重复性.结果表明,利用一个低压电磁线圈产生的磁场就可以控制剪切型磁流变脂阻尼器-转子系统的动力特性,在合适的磁场条件下剪切型磁流变脂阻尼器能够极大地抑制转子系统的振动,剪切型磁流变脂阻尼器-转子系统的动力特性在较长的时间内具有良好的重复性,剪切型磁流变脂阻尼器适合作为转子系统振动的主动控制元件.
英文摘要：
In order to greatly reduce the effect of sedimentation in magnetorheological fluids （MRF） on dynamic behavior of the MRF based devices, a kind of magnetorheological greases （MRG）, whose rheological property can also be significantly changed on the application of an external magnetic field, is presented, and a MRG based shear-type damper operating in shear mode for rotor system of rotational machinery and a flexible rotor system with an over-hung disk are developed. The controllability of the shear-type MRG damper on the dynamic behavior of a rotor system, the effectiveness of the shear-type MRG damper for attenuating the rotor＇s vibration, the suitability of the MRG damper for active vibration control of rotor systems, and the repeatability of the dynamic characteristics of the shear-type MRG damper rotor system during a longer period of time are experimentally studied in the flexible rotor system. Results show that the dynamic behavior of the shear-type MRG damper rotor system can be controlled on the application of an external magnetic field produced by a low voltage electromagnetic coil, the shear-type MRG damper can greatly suppress the vibration of the rotor system at a properly magnetic field, the dynamic behavior of the shear-type MRG damper rotor system does not change during a longer period of time, and the shear-type MRG damper is suitable for an actuator to actively control the vibration of rotor systems.
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