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<p>This study presents a semi-analytical vibration model for a partially fluid-filled cylindrical shell reinforced with inner and outer piezoelectric ceramic layers. The formulation incorporates full electro-hydro-mechanical coupling based on Love’s thin shell theory and potential-flow fluid modeling, enabling simultaneous evaluation of fluid-induced added-mass, damping and voltage-induced stiffness tuning under realistic boundary conditions. The model’s accuracy is validated against benchmark dry and wet cases. Parametric analyses reveal that increasing fluid height markedly reduces natural frequencies and alters mode shapes through added-mass effects, while applied voltages enable active stiffness modulation and vibration suppression with minimal frequency shift. The proposed velocity-feedback scheme, using the inner layer as a sensor and the outer as an actuator, achieves up to 82% reduction in vibration amplitude. The integrated framework offers high-fidelity predictions and practical guidelines for the design and control of fluid-loaded piezoelectric shell structures in engineering applications.</p>

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Analysis of Vibration of a Shell Containing Fluid Equipped with Piezoelectric Layers

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Ali Najafi Ardekany,
  • Seyed Amin Moosavi,
  • Abbas Dorahaki,
  • Amirmohammad Yahyapour Koumleh,
  • Amirshayan Moghaddam

摘要

This study presents a semi-analytical vibration model for a partially fluid-filled cylindrical shell reinforced with inner and outer piezoelectric ceramic layers. The formulation incorporates full electro-hydro-mechanical coupling based on Love’s thin shell theory and potential-flow fluid modeling, enabling simultaneous evaluation of fluid-induced added-mass, damping and voltage-induced stiffness tuning under realistic boundary conditions. The model’s accuracy is validated against benchmark dry and wet cases. Parametric analyses reveal that increasing fluid height markedly reduces natural frequencies and alters mode shapes through added-mass effects, while applied voltages enable active stiffness modulation and vibration suppression with minimal frequency shift. The proposed velocity-feedback scheme, using the inner layer as a sensor and the outer as an actuator, achieves up to 82% reduction in vibration amplitude. The integrated framework offers high-fidelity predictions and practical guidelines for the design and control of fluid-loaded piezoelectric shell structures in engineering applications.