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本文分析了无阻尼动力减振器难以设计成功的主要原因。提出了用“减振系数”η来表达减振特性的新观点。建议以η<1作为设计目标确定减振器的各项参数,以此代替通常用动力放大因子A_1/δ_(st)的表达式。研究了主系统处于非共振条件和减振器参数、干扰力频率改变时,确保减振效果的条件和方法。
This paper analyzes the main reasons why undamped dynamic dampers are difficult to design successfully. A new idea to express the damping characteristics using the “damping coefficient” η is proposed. It is recommended to use η<1 as the design goal to determine the parameters of the damper, instead of the usual expression for the power amplification factor A_1/δ_(st). The conditions and methods to ensure the vibration reduction effect when the main system is in the non-resonant condition and the damper parameters and disturbance force frequency are changed are studied.