压电陶瓷弹性支承干摩擦阻尼器减振实验

Experiment on vibration reduction by elastic support/dry friction damper with piezoelectric ceramic

设计一种带有压电陶瓷执行机构的弹性支承干摩擦阻尼器,对其减振效果进行了实验验证.首先介绍了弹性支承干摩擦阻尼器的基本工作原理,接着回顾了一种电磁铁作动方式的弹性支承干摩擦阻尼器,提出了将压电陶瓷运用于其执行机构的方案,该方案可简化其结构,减少其质量,最后对该方案的减振效果进行了实验验证.结果表明:带有压电陶瓷执行机构的弹性支承干摩擦阻尼器对转子系统的振动具有明显的抑制作用,转子经过临界转速点的振幅最大减小约66%,并且与原阻尼器相比,结构更简单,质量减少一半,且功耗仅为5W.

An elastic support/dry friction damper using piezoelectric ceramic was de signed and its effectiveness of reducing rotor vibration was experimentally verified. Firstly, the basic operation mode of elastic support/dry friction damper was introduced. Then based on the previous structure using an electromagnet, an elastic support/dry friction damper u sing piezoelectric ceramic which was simpler and lighter was designed, and its effectiveness of reducing rotor vibration was experimentally verified. The experimental results show that the elastic support/dry friction damper using piezoelectric ceramic can significantly reduce vi bration in a rotor system the maximum reduction of vibration amplitude is about 66% at the critical speed. Compared with the previous design, the structure is much simpler, the weight is reduced by half and the power consumption is just 5 W.