Vibration suppression of tunable frequency metastructure fluid-filled pipeline

WANG Kexin1,2, YANG Zhichun1, ZHAO Tian1, XU Yanlong1, TIAN Wei1

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (13) : 180-189.

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (13) : 180-189.

Vibration suppression of tunable frequency metastructure fluid-filled pipeline

  • WANG Kexin1,2, YANG Zhichun1, ZHAO Tian1, XU Yanlong1, TIAN Wei1
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Abstract

A metastructure fluid-filled pipeline with tunable frequency local resonance units is proposed. By adjusting the installation position of mass blocks on the spring blades, the natural frequency of the local resonance units can be adjusted, thereby realizing vibration suppression of the fluid-filled pipeline at multiple frequencies. Firstly, the structural dynamics model of the metastructure fluid-filled pipeline with tunable frequency local resonance units is established, and the motion equation of the metastructure fluid-filled pipeline is derived using the Galerkin method. Then, the analytical expression for multiple bandgaps is obtained using modal analysis methods. A corresponding finite element model is established to numerically simulate the multi-frequency vibration reduction characteristics, followed by validation experiments. The computational and experimental results confirm the existence of multiple bandgaps in the proposed metastructure fluid-filled pipeline, leading to significant suppression of bending vibration within the bandgap range. This research demonstrates that the use of tunable frequency local resonance units can effectively suppress vibration of the fluid-filled pipeline at multiple frequencies, providing reference for vibration reduction applications in the pipeline across multiple target frequency ranges.

Key words

Metastructure fluid-filled pipeline / Multi-frequency bandgap / Tunable frequency local resonance unit / Vibration suppression

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WANG Kexin1,2, YANG Zhichun1, ZHAO Tian1, XU Yanlong1, TIAN Wei1. Vibration suppression of tunable frequency metastructure fluid-filled pipeline[J]. Journal of Vibration and Shock, 2024, 43(13): 180-189

References

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