宽频带动力吸振器功率流特性研究

The characteristic of power flow in broad band dynamic vibration absorber

通过在弹性振动体上附加动力吸振器，可有效抑制弹性体的共振能量，针对一般弹性体模态丰富的特点，本文提出一种宽频带动力吸振器的形式，并对这种宽频带动力吸振器的吸振性能进行分析，为今后的优化设计和优化布置奠定理论基础。

DVA (Dynamic Vibration Absorber) is good for restrain of the resonance vibration in low frequency, espe- cially under the condition that there are only one mode or two modes in one frequency band. It seems rather difficult to control the resonance vibration of elastic structures in higher frequency, since usually there are so many modes in higher frequency band. The broad band DVA is brought forward to reduce the resonance vibration of elastic structures. The broad band DVA is designed on the basis of the characteristic of power flow in structure in this paper. The broad band DVA is effective on absorbing the resonance vibration power flow of the most important modes. The ability of absorbing vibration for the broad band DVA is analyzed in detail. The results obtained in this paper provide the basis for the optimization design of the broad band DVA and the optimization positions on structures.