充液管路轴向多吸振器波动特性研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (5) : 261-266.

论文

充液管路轴向多吸振器波动特性研究

吴江海，孙玉东，尹志勇，苏明珠

作者信息 +

Wave characteristics of axial multi-dynamic absorber in liquid-filled pipeline

WU Jianghai, SUN Yudong, YIN Zhiyong, SU Mingzhu

Author information +

文章历史 +

摘要

为抑制充液管路中轴向振动波传播，利用吸振器安装点处位移与轴向力连续条件，采用传递矩阵法建立充液管路带多个吸振器动力学耦合模型，与有限元计算结果对比，验证了本文计算方法的正确性。计算分析了轴向波在吸振器前后的透射与反射系数，并进一步计算了吸振器周期排列时管路轴向振动带隙。研究结果表明：轴向波在吸振器共振频率全部反射，反射系数带宽随吸振器刚度与阻尼增大而变化；吸振器周期分布时，管路系统轴向振动同时存在局域共振型带隙与Bragg带隙，轴向波在局域共振型带隙内得到了有效的抑制。研究结果可为管路轴向减振、吸振器设计提供参考。

Abstract

In order to suppress the propagation of axial vibration wave in liquid filled pipe, the transfer matrix method is proposed to establish the dynamic coupling model of fluid filled pipe with multiple axial dynamic vibration absorbers(DVA). The present method is validated by compared dynamic response and natural frequency with FEM. Reflection and transmission coefficient of axial wave before and after DVA are analyzed, and the vibration band gap of pipeline is calculated when the DVAs are arranged periodically. The research results show that: axial waves are all reflected at the resonant frequency of the DVA, reflection bandwidth vary with the stiffness and damping. When DVAs are distributed periodically, there exists both Bragg and Locally Resonant(LR) band gap. The axial wave in effectively controlled in the LR band gap. This research can provide reference for the design of axial vibration reducing and DVA.

导出引用

吴江海，孙玉东，尹志勇，苏明珠. 充液管路轴向多吸振器波动特性研究[J]. 振动与冲击, 2022, 41(5): 261-266

WU Jianghai, SUN Yudong, YIN Zhiyong, SU Mingzhu. Wave characteristics of axial multi-dynamic absorber in liquid-filled pipeline[J]. Journal of Vibration and Shock, 2022, 41(5): 261-266

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