管道金属摩擦阻尼减振器性能的实验研究

Experimental study of the characteristics of a metal frictional damper applied to a pipeline

设计了一种新型管道金属摩擦阻尼减振器,并对带金属摩擦阻尼减振器的管道系统进行了振动响应的实验研究。通过测量管道径向、轴向和激振器支撑架的振动响应,研究了金属摩擦阻尼减振器的减振性能和减振机理。实验结果表明:金属摩擦阻尼减振器能够有效降低管道系统的振动,管道和激振器支撑架径向振动响应最大时,振动幅值分别下降66.2%和75.4%,激振频率为50 Hz时,管道轴向振动幅值下降83%;管道振动能量没有被转移至激振器支撑架,而是通过金属摩擦阻尼减振器与管道外壁的干摩擦作用将振动能量转化为热能而耗散。

A novel type of damper for piping--a metal frictional damper--has been designed and fabricated. A series of experiments were carried out in order to measure the vibration response of the piping with the metal frictional damper mounted. After obtaining the vibration response of the exciter support and the piping in both the radial and axial directions, the damping characteristics and the mechanism of operation of the metal frictional damper have been identified. The experimental results demonstrated that the vibration magnitude of the piping can be effectively reduced by addition of the metal frictional damper： when the radial vibration magnitudes of the piping and exciter support reached a maximum the vibration responses decreased by 66.2% and 75.4% , respectively, and the axial vibration response of the piping decreased by 83% when the frequency was 50 Hz. It was shown that the vibrational energy was converted to heat by micro-friction between the metal frictional damper and the piping wall, rather than being transferred to the exciter support.