一种可调频式的管路动力吸振器研究与实验验证

Study and Experimental Verification on a Dynamic Vibration Absorber with Frequency Adjustable

基于反共振原理,设计了一种可调频式的管道动力吸振器,通过移动弹簧片上的质量块位置,并将其安装在管路共振位移最大处,可以实现不同频率下管道减振。通过构建了一段空间管路,利用有限元仿真分析和管道振动实验,验证了本文设计的调频动力吸振器能够在不同共振频率处对管路进行有效减振,结果表明调节减振器弹簧片上的质量块位置能够将减振器的减振效果调整到最佳。所研究的可调频式管道动力吸振器具有很强的工程应用价值。

A dynamic vibration absorber with frequency adjustable was designed based on anti-resonant principle. The leaf spring with moveable mass block was installed at the point of the pipeline where the resonant displacement reached the maximum. By moving the mass block on the leaf spring, the vibration reduction of the pipeline could be realized for different frequencies. Then, a spatial pipeline was built. The finite element simulation and the vibration test for the pipeline were carried out. The ability of the designed dynamic vibration absorber for vibration damping of the pipeline which possesses different natural frequencies within the available range of frequency was validated. It is concluded that the best damping effect of the dynamic vibration absorber can be obtained through adjusting the position of mass block on the leaf spring. And the best installation location of the absorber is where the maximum resonant displacement occurs on the pipeline. This work is of important significance for practical application of the dynamic vibration absorbers.