电流变阻尼器用于转子振动控制的实验研究

实验研究了电流变阻尼器在转子振动控制中的应用。实验发现，电流变阻尼器的刚度及阻尼随外加电场强度的增加而增大，支承在电流变阻尼器上的转子系统的振幅在亚临界区及临界转速处随施加的电场强度的增加而减小，而在超临界处则随电场强度的增加而增大；系统的临界转速随电场强度的增加而升高。电流变阻尼器提供的阻尼具有库仑阻尼和粘性阻尼的特点。实验表明电流变阻尼器具有控振效果明显、瞬时可控、耗能小、频带宽及结构简单的特点。

EXPERIMENTAL INVESTIGATION ON ROTOR VIBRATION CONTROL BY ELECTRORHEOLOGICAL DAMPER

In this paper the Electrorheological(ER) fluid and its characteristics are introduced briefly and the application of an ER damper in rotor vibration control is studied experimentally.It is found that by increasing the applied electrical field strength,the damping and stiffness of ER damper are increased, the vibration amplitude of the rotor system supported on ER damper is decreased in the sub-critical speed range and at the critical speed, and is increased in the super-critical speed range. The critical speed of the rotor system can be changed by means of the applied electrical field strength. The damping provided by the ER damper has the properties of both the Coulomb damping and the viscous damping. Experimental results show that the ER damper has obvious effect on vibration control,and features instantaneous control,little energy consumption and broad frequency range.Besides,it's structure is simple.