半主动TMD控制双跨轴系过临界振动的研究

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。

Study on semi-active TMD controlling vibration of two-span rotors over critical speeds

Aiming at the vibration problems of the multi-rotors machinery through critical speeds,the applications for tuned mass damper in two-span rotors system were studied.And based on the rotor structure,a cage-type semi-active tuned mass damper with symmetrical structure was proposed in order to control vibrations of multi-span rotors over critical speeds.A two-span rotors bench was built to experimentally study on the influence of shaft rotors vibration by installing the tuned mass dampers on each span shaft respectively,without changing the original shaft rotors support form.Experimental results show that the uncontrollable TMDs can only effectively suppress the vibration of the shaft where the TMD installed near critical speeds but little effect on the adjacent shaft.However,they will cause new formants.According to experimental results achieve dampers semi-active control by the switching control strategies.And it experimentally verified that the semi-active tuned mass damper can suppress the vibration of the shaft through the critical speeds in the case of non-stop,and avoid detuning.