悬臂式调谐质量阻尼器抑制管道振动研究

基于调谐质量阻尼器(TMD)的结构振动控制机理，将调谐质量阻尼器应用到管道的振动控制中。针对传统弹簧结构无法满足高频振动下调谐质量阻尼器刚度设计要求的问题，设计了一种便于安装的圆形截面悬臂式调谐质量阻尼器，其周向对称布置式结构可以对管道各个方向下的振动进行控制。理论推导并对比了传统悬臂梁和悬臂式TMD固有频率的计算公式，计算得到300Hz对应的悬臂式TMD结构参数，并利用Ansys模态分析对设计参数的准确性进行了验证。最后建立了激振器-TMD高频振动实验台装置，对悬臂式TMD在300Hz左右的减振特性进行了实验，结果表明设计的TMD能够有效抑制300Hz左右的高频振动，且有较宽的减振频带范围。

Pipeline vibration control with a cantilever type tuned mass damper

This paper presents a new way to reduce pipeline vibration with a tuned mass damper (TMD) based on the structural vibration control mechanism of TMD. A new type of circular section cantilever tuned mass damper which can be easily installed has been designed, since a traditional spring cannot meet the stiffness requirements of TMD at high frequency vibration. Pipeline vibration in all directions can be controlled with a circular symmetric layout of four cantilever tuned mass dampers. Natural frequency formulas of a traditional cantilever beam and the cantilever TMD were derived theoretically and compared. The structure parameters of the cantilever TMD with 300Hz natural frequency were obtained based on the relevant formulae, and were verified by Ansys modal analysis. A high frequency vibration test bench was established which verified the performance of the cantilever TMD at a frequency of 300Hz. The results show that the cantilever TMD can suppress vibration effectively at 300Hz and has a wide range of frequency bands.