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<p>Considering the increasing demand for vibration and noise control in fluid-conveying pipeline systems, this study presents the wave-based analytical model for investigating the vibration behavior of periodic pipe structures filled with internal fluids. The model is formulated by integrating Timoshenko beam theory with the wave-based method. Governing differential equations are derived, considering both cross-sectional deformation and shear effects. A fluctuation-type solution is employed to obtain the displacement fields. Based on the displacement and force continuity conditions at the interfaces of adjacent units, together with the appropriate boundary conditions, the global dynamic equations of the periodic fluid-filled pipe structure are derived.The model’s accuracy is validated through comparison with finite element method (FEM) results. Subsequently, a parametric analysis is performed to examine the effects of fluid velocity, structural geometry, and material properties on the bandgap characteristics. The proposed framework offers theoretical insights and practical guidance for the design and vibration control of fluid-filled periodic pipeline systems.</p>

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Wave-based analysis and parametric study of vibration in fluid-filled periodic pipe structures

  • 期刊论文

  • 发表日期：

    2025年9月28日

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  • Dongze He,
  • Shuang Du

摘要

Considering the increasing demand for vibration and noise control in fluid-conveying pipeline systems, this study presents the wave-based analytical model for investigating the vibration behavior of periodic pipe structures filled with internal fluids. The model is formulated by integrating Timoshenko beam theory with the wave-based method. Governing differential equations are derived, considering both cross-sectional deformation and shear effects. A fluctuation-type solution is employed to obtain the displacement fields. Based on the displacement and force continuity conditions at the interfaces of adjacent units, together with the appropriate boundary conditions, the global dynamic equations of the periodic fluid-filled pipe structure are derived.The model’s accuracy is validated through comparison with finite element method (FEM) results. Subsequently, a parametric analysis is performed to examine the effects of fluid velocity, structural geometry, and material properties on the bandgap characteristics. The proposed framework offers theoretical insights and practical guidance for the design and vibration control of fluid-filled periodic pipeline systems.