新型滚珠式多向动力吸振器的理论研究

A new ball type dynamic multi-direction vibration absorber

提出了一种用于控制特殊多方向强迫振动的滚珠式动力吸振器。通过理论分析和数值计算,研究了该吸振器的振动控制机理和主要参数对吸振效果的影响。利用定点理论,优化设计了控制系统的最优频率和最优阻尼。研究表明,利用该结构简单的吸振器可以有效地控制机械或结构在共振频率点附近所发生的特殊的强迫振动响应。

A ball type dynamic vibration absorber was presented to control special multi-direction forced vibrations. Based on theoretical analysis and numerical calculation, its mechanism and the effects of parameters of vibration control of the absorber on the vibration absorption were clarified. According to the fixed-points theory, the frequency and the damping of the vibration control system were optimized. The results showed that the special forced vibration at resonance points of a machine or a structure can be reduced effectively by using this simple ball type dynamic vibration absorber.