Using finite element analysis method,the numerical simulation and experimental test of the underwater environment of the flexible circular tube energy-capturing structure of built-in piezoelectric cantilever beam are carried out,and the comparative analysis is carried out.The effects of conditional parameters such as the shape and diameter of the pre-bluff body on the performance of the energy capture structure flexible circular tube of piezoelectric cantilever are simulated and experimentally tested,respectively.The simulation results show that the amplitude and voltage of the energy-harvesting structure of the cylindrical pre-bluff body are larger than those of the pre-hexagonal and square column energy-harvesting structures.When the flow rate is 1.0 m/s,and the diameter of the cylindrical pre-bluff body is 0.03 m,the maximum amplitude and voltage generated by the energy capture structure are 2.85×10-4 m and 9.88 V,respectively.The experimental results show the same trend as the numerical simulation results.When the flow rate is 1.0m/s and the diameter of the rigid cylindrical bluff body is 0.03 m,the measured peak-to-peak value of output voltage is 5.63 V.Through numerical simulation and experimental test,the influence of the shape and diameter of the bluff body on the performance of the energy-harvesting structure is analyzed,which provides a theoretical and experimental reference for the underwater vortex-induced vibration piezoelectric energy harvesting technology.
关键词
涡致振动/压电能量收集/压电俘能器/有限元仿真
Key words
vortex-induced vibration/piezoelectric energy harvesting/piezoelectric energy harvester/finite element simulation
维普
万方数据