采用等效阻尼法分析带有摩擦阻尼振动筛的振动特性

Vibration characteristics of shaker with friction damping by way of equivalent damping

振动筛在启动和停车过程中必须通过共振区,引起振幅的异常增大,经常采用摩擦阻尼器限制过大的振幅,并且取得了良好的减振效果。这种方法目前在工程上缺乏理论分析,本文推导了带有摩擦阻尼振动筛振幅的计算公式,着重研究了共振阶段性的振幅,理论计算值为18 mm,这个结果和实验结构吻合,为振动筛的设计提供了理论依据。

Shaker would through a resonance in the phase of the stopping, led to the amplitude increase abnormaly. Friction damper often is used to restrict the abnormal amplitude, this method can achieve the desired results. At present, the use of this approach on project is in a lack of theoretical analysis. Formula of amplitude of shaker with friction damping with a friction damper was deducted. This research focused on the amplitude in the stage of resonance amplitude. Theoretical calculations is 18 mm, the result matched to the experimental results. This research provides a theoretical basis for design of shaker.