Design of Shunted Piezoelectric Patches Using Topology Optimization for Noise and Vibration Attenuation

摘要

Passive structural vibration reduction and noise attenuation by means of shunted piezoelectric patches is addressed in this paper. In this technology, an elastic structure is equipped piezoelectric patches that are connected to passive shunt circuits. The piezoelectric patches convert a fraction of the mechanical energy of the vibrating structure into electrical energy, which is then dissipated via the shunt circuits. The optimization in terms of damping efficiency, of the full electromechanical system composed by a host elastic structure with bonded piezoelectric patches connected to shunt circuits, is under study in this work. The concept of topology optimization, based on the Solid Isotropic Material with Penalization method (SIMP), is employed to optimize the geometry of piezoelectric patches as well as their placement on the host elastic structure. The proposed optimization procedure consists of distributing the piezoelectric material in such a way as to maximize the modal electro-mechanical coupling factor (MEMCF) of the mechanical vibration mode to which the shunt is tuned.