Abstract: In reality, all vibration absorbers have bases. When the vibration absorber is fixed to a flexible base, the base will affect its vibration attenuation effect. Aiming at this problem, simulation researches are carried out with the power flow method in this paper. A mathematical model of the system composed of the vibration absorber with a base and coupled with an ends-fixed beam is established. With this model, the vibration attenuation effects of the vibration absorbers fixed at different positions of the beam are simulated, and the influence of the base size on the vibration attenuation effect is analyzed. On the basis, the vibration attenuation effect with double vibration absorbers attached is compared with that with a single vibration absorber attached. The results show that the vibration attenuation effect of the vibration absorber can be improved effectively by optimizing its base and installation condition. This work provides guidance for the engineering application of the vibration absorbers.

Key words: vibration and wave, vibration absorber, base, vibration attenuation effect, beam

摘要： 实际使用的吸振器都具有一定尺寸的安装底座。当吸振器安装于柔性主系统时，底座将影响吸振器的减振效果。针对此问题，利用功率流方法进行仿真研究。建立有底座吸振器和两端固支梁主系统耦合的数学模型。利用该模型对吸振器安装在梁上三个不同位置的情况进行仿真研究，并分析底座尺寸的影响，在此基础上比较两个吸振器和单个吸振器的减振效果。研究结果表明，通过优化吸振器的底座和安装方式能够有效地改善吸振器的减振性能。这为吸振器的工程应用提供一定的参考。

关键词: 振动与波, 吸振器, 底座, 减振效果, 梁