<p>A cantilevered beam covered by a Macro-Fiber Composite actuator can generate large deformations, enabling applications of flapping wings and underwater oscillating fins. A piezocomposite beam can be actuated harmonically by a resistance-inductor-capacitor resonator, and interact with ambient fluids to yield flow vectoring, control, and/or propulsion. In the past, several electro-mechanical or fluid-structure interaction models have been developed and validated to predict the dynamics of such systems. However, a complete electro-mechanical-fluid coupled model has not been demonstrated in the literature. In this paper, a complete coupled system model is developed to obtain insights into the coupling mechanism and investigate the system optimal parameters. To give prominence to the coupling mechanisms, the system is simplified to a lumped parameter model. The electromechanical coupling is modeled by a transformer, and the fluid-structure interactions are represented by the added mass and added damping coefficients, which are determined by solving linearized Navier-Stokes equations.&nbsp;The thin-flat rectangular beam immersed in the fluid is approximated by an elliptic one. The vibration of the ellipse beam is solved numerically in a polar coordinate system. The coupled model&nbsp;is converted into a transfer function, where the system input is voltage, and the output is displacement. Based on the coupled model, efficiency, resonance frequency, and oscillating amplitude are analyzed to find the optimal geometry and circuit parameters.</p>

A Lumped Parameter Electro-Mechanical-Fluid Coupling Model for an Oscillating Beam in Fluids

Paper Proceedings: https://asmedigitalcollection.asme.org/SMASIS/SMASIS2021/volume/85499

ASME 2021 Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS2021)

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.