基于有限元分析的宽带动力吸振器技术研究

Study of Broad Band Dynamic Vibration Absorbers Based on Finite Element Analysis

研究了不同自由度的动力吸振器的吸振效果,以有限元分析软件为平台,以悬臂梁为多自由度主系统的典型代表,通过分析节点的强迫振动位移和辐射噪声场中场点的声压级两个方面,研究了动力吸振器自由度数和其吸振带宽之间的关系,研究表明动力吸振器的自由度数越高,吸振带宽越大.

The vibration control effect of different degrees of freedom dynamic vibration absorbers is researched. Based on finite element analysis, making use of cantilever beam as the typical representation of multiple-degree of freedom host system, the relationship between the number of freedom of dynamic vibration absorbers and the bandwidth is studied with analyzing of the forced vibration displacement of nodes and the sound pressure level of points in the radiated-noise-field. The study shows that the larger of degrees of freedom of the dynamic vibration absorbers, the bigger of the bandwidth.