研究目的
To propose a numerical method for analyzing a thin piezoelectric bimorph in fluid by modeling the triply coupled piezoelectric-structure–fluid interaction using a hierarchically decomposed finite element method.
研究成果
The proposed hierarchically decomposed finite element method effectively models the triply coupled piezoelectric-structure–fluid interaction of a thin piezoelectric bimorph in fluid. The method accurately captures the resonance characteristics for both actuation and sensor configurations, demonstrating its potential for applications in energy harvesting and micro air vehicles.
研究不足
The study is limited to the analysis of thin piezoelectric bimorphs in fluid and does not explore the effects of varying fluid properties or different piezoelectric materials beyond PVDF and PZT-5H.
1：Experimental Design and Method Selection:
The study employs a hierarchically decomposed finite element method for modeling the triply coupled piezoelectric-structure–fluid interaction. The electromechanical coupling is described by the classical constitutive equation, fluid flows by the Navier–Stokes equation, and structure by the Cauchy equation of motion.
2：Sample Selection and Data Sources:
The study focuses on a thin piezoelectric bimorph cantilever made of PVDF and PZT-5H material in fluid.
3：List of Experimental Equipment and Materials:
The materials used include PVDF and PZT-5H for the piezoelectric bimorph, and silicone oil as the fluid medium.
4：Experimental Procedures and Operational Workflow:
The piezoelectric-structure–fluid interaction system is decomposed into subsystems of fluid–structure interaction and piezoelectric field, coupled using the block Gauss–Seidel method. The fluid–structure interaction is further split into velocity and pressure fields using algebraic splitting.
5：Data Analysis Methods:
The resonance characteristics of the piezoelectric bimorph in fluid are investigated for actuation and sensor configurations.
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