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针对大型旋转机械通过临界转速时振动过大及运行中故障频发等问题,搭建转子试验台,模拟启停机过程和碰摩、不对中故障。不改变原有支撑形式,安装自主设计的磁流变阻尼器,在不停机的情况下,试验研究阻尼器抑制转子通过临界转速时振动过大及各类故障振动。试验结果表明,阻尼器可以有效抑制转子系统临界转速附近的振动,降幅在60%以上;转子发生碰摩或不对中故障时,阻尼器可以降低其高倍频振动。 相似文献
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针对多轴串联机械通过临界转速时振动过大的问题,对调谐质量阻尼器在双跨轴系振动控制中的应用进行了研究。并基于转子结构,设计了具有对称结构的笼式半主动调谐质量阻尼器用于控制轴系振动;搭建了双跨转子实验台,在不改变转子轴系原有支撑形式上,在两根轴上分别安装了调谐质量阻尼器,对调谐质量阻尼器对轴系各跨转子振动的影响规律进行了实验研究。研究结果表明,不可控调谐质量阻尼器可以有效抑制安装所在轴临界转速附近的振动,对相邻轴影响较小,但会引起新共振峰。根据此实验结果通过开关控制策略实现调谐质量阻尼器半主动控制,说明半主动调谐质量阻尼器可以在不停机的情况下,抑制转子轴系通过各阶临界转速时的振动,避免失谐。 相似文献
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A control system aims at vibration reduction in a two-span rotor system with two shear mode magnetorheological (MRF) dampers is designed. A finite element model of the MRF damper-rotor system is built and used to analyze the rotor vibration characteristics. Based on Hooke and Jeeves algorithm and the numerical simulation analysis, an optimal appropriate controller is proposed and designed. Experimental results show that rotor vibration caused by unbalance is well controlled (first critical speed region 37%, second critical speed region 42%). To reflect advantages of optimizing strategy presented and validate the intelligent optimization control technology, detailed experiments were developed on a two-span rotor-vibration-control platform. The influence on accuracy, rapidity and stability of optimizing control for rotor vibration are analyzed. It provides a powerful technical support for the extension and application in target and control for shafting vibration. 相似文献
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