Modeling of Piezoelectric Energy Harvesting from Freely Oscillating Cylinders in Water Flow

被引：32
作者：
Zhang, Min [1 ,2 ]
Liu, YingZheng [1 ]
Cao, ZhaoMin [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Key Lab Educ Minist Power Machinery & Engn, Shanghai 200240, Peoples R China
[2] Chongqing Jiaotong Univ, Maritime Coll, Chongqing 40074, Peoples R China
来源：
MATHEMATICAL PROBLEMS IN ENGINEERING | 2014年 / 2014卷
关键词：
VORTEX-INDUCED VIBRATION; CRITICAL MASS; FLUID FORCES; BLUFF-BODIES; GENERATOR; DYNAMICS; DESIGN;
D O I：
10.1155/2014/985360
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A concept of energy harvesting from vortex-induced vibrations of a rigid circular cylinder with two piezoelectric beams attached is investigated. The variations of the power levels with the free stream velocity are determined. A mathematical approach including the coupled cylinder motion and harvested voltage is presented. The effects of the load resistance, piezoelectric materials, and circuit combined on the natural frequency and damping of the vibratory system are determined by performing a linear analysis. The dynamic response of the cylinder and harvested energy are investigated. The results show that the harvested level in SS and SP&PS modes is the same with different values of load resistance. For four different system parameters, the results show that the bigger size of cylinder with PZT beams can obtain the higher harvested power.
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页数：13
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