Topology Optimization Analysis of Leaf Vein Bionic Piezoelectric Energy Collection Device based on Vortex-induced Vibration

Vortex-excited vibration induced by cylindrical flow around piezoelectric plates is the prototype of many piezoelectric energy collection devices. The increasingly lack of energy has put forward new requirements for the development of new energy sources. The vortex-induced vibration acts on the piezoelectric plate, and the energy conversion efficiency is affected by the piezoelectric plate structure. Therefore, the structure design of piezoelectric energy collection device is worth further studying. In this paper, utilizing the improved model based on SIMP modelling method and the MMA solution method, the topological optimization analysis of piezoelectric material structure is carried out. Optistruct simulation results show that, piezoelectric structure by the topology optimization is very similar with leaf shape in nature. Therefore, several bionic piezoelectric blade structures are boldly optimized. The experiment further proves that the piezoelectric energy collection efficiency has a significant improvement compared with that before the optimization.