含分段阻尼特性动力吸振器的吸振性能  

Vibration absorption characteristics of dynamic vibration absorber with piecewise damping characteristics

作　　者：卢学礼 邢海军 阮子悦 LU Xue-i;XING Hai-jun;RUAN Zi-yue(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北石家庄050043

出　　处：《振动工程学报》2024年第6期945-953,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(U1934201)。

摘　　要：利用凸轮机构设计了一种分段阻尼装置。以传统Voigt型动力吸振器为基础,将该装置安装于动力吸振器的主系统与子系统之间,建立了吸振器的动力学方程。利用在一个振动周期内阻尼耗能等效这一原理,在相同振动频率下得到了分段阻尼装置的等效阻尼系数。推导得出了具有分段阻尼特性的动力吸振器的理论解,并用数值解进行了验证。比较分析了无阻尼、传统线性阻尼及具有分段阻尼特性的动力吸振器的吸振特性。结果表明,具有分段阻尼特性的动力吸振器的幅频特性综合了无阻尼和传统线性阻尼动力吸振器的特点,能保证反共振点处主系统的振幅很低,同时对主系统的共振振幅的抑制效果接近于传统线性阻尼动力吸振器。A segmented damping device is designed using a cam mechanism in this study.Based on the traditional Voigt dynamic vi-bration absorber,this device is installed between the main system and subsystem of the dynamic vibration absorber,and the dynam-ic equation of the vibration absorber is established.Using the principle of equivalent damping energy dissipation within one vibration period,the equivalent damping coefficient of the segmented damping device at the same vibration frequency is obtained.The theo-retical solution of a dynamic vibration absorber with piecewise damping characteristic is derived and verified by numerical solution.The vibration absorption characteristics of undamped,traditional linear damping,and dynamic absorber with piecewise damping are compared and analyzed.The results show that the amplitude frequency characteristics of the dynamic vibration absorber with piecewise damping characteristics integrate the characteristics of undamped and traditional linear damping dynamic vibration absorb-ers.This ensures that the amplitude of the main system at the anti-resonance point is very low,and the suppression effect of the res-onance amplitude of the main system is close to that of the traditional linear damping dynamic vibration absorber.

关 键 词：动力吸振器 分段阻尼 共振 反共振 能量等效 

分 类 号：O322[理学—一般力学与力学基础] TH113.1[理学—力学]