Design and study on dynamic vibration absorber of fluid-conveying pipes based on the receptance method

Abstract

[Objectives]The fluid-conveying pipes may vibrate under external excitation. In order to reduce the vibration of the fluid-conveying pipes and study the vibration-reduction characteristics of the Dynamic Vibration Absorber(DVA),[Methods]the receptance matrix of the multi-degree-of-freedom (DOF)system of the additional spring-mass system was derived based on the passive modification method in the receptance method,and the zero assignment of the target DOF in the multi-DOF system was performed to suppress the corresponding vibration under the target DOF. On this basis,a DVA was designed and applied to the fluid-conveying pipes for experiments to verify its vibration-reduction effect.[Results]The results show that the designed DVA can well absorb the vibration at the target frequency, and the vibration reduction is better for a larger tuned mass when the target frequency is the same.[Conclusions]Such DVA is convenient to install and has a wide application range,which can provide a certain reference for pipe vibration reduction research.

Keywords

• pipe vibration
• fluid-conveying pipes
• vibration reduction
• Dynamic Vibration Absorber (DVA)
• zero assignment
• receptance method