有阻尼吸振器参数优化与应用

针对某一特定频率下的振动问题,优化有阻尼吸振器参数来对其进行吸振。先对悬臂梁进行模态分析,得到对振动贡献最大的频率并确定吸振器的安装位置;然后,应用单自由度质量感应法得到动力吸振器在主振动系统上安装位置点的等价质量和等价刚度,并由其组成一个等效的单自由度系统;建立吸振器的数学模型,并基于理论推导出具有单自由度的动力吸振器的解析解,得到吸振器的3个参数;以悬臂梁为例,应用Abaqus软件仿真附加吸振器前后测试点的振动响应。仿真结果显示,安装动力吸振器后,测试点的振动得到显著降低,证实了吸振器的有效性。

The Parameter Optimization and Application of Damping Absorber

Aimed at vibration problems of a particular frequency, optimizes the parameters of the damping vibration absorber for the vibration absorption. Analyzed the cantilever beam modal, obtained the frequency of maximum contribution to vibration and determined the installation position of absorber; Applied the single free induction method to obtain equivalent mass and equivalent stiffness of dynamic vibration absorber on main vibration system installation position and built an equivalent single degree freedom system; Established the absorber mathematical model, and deduced theoretically the analytical solution for a single degree dynamic absorber and obtained three parameters for the absorber. Taking the cantilever beam as an example, applied Abaqus software to simulate the vibration response of test points attached to the vibration absorber front and back. The results showed that the vibration of test points was greatly decreased and the effectiveness of absorber was verified.