摘要
将三稳态振动模式引入到流体驰振能量捕获器中,提出了一种用于流致振动环境下的三稳态压电悬臂梁驰振能量捕获器,建立了其力学模型及动力学方程。利用数值仿真比较了双稳态和三稳态驰振系统的动力学特性和发电性能,证明了在较低流速下三稳态系统更容易发生大幅运动,发电性能更好。进一步研究了三稳态系统参数对驰振能量捕获器发电性能的影响。
Advances in MEMS technology have greatly reduced the power consumption of asensor,whichcan be self-powered with environmental energy.In this paper,a three-stable vibration mode is introduced into the galloping vibrationenergy trap.A tri-stable cantilever beam piezoelectric vibration energy harvester is proposed.The mechanical model and dynamic equation are established.The bi-stability is studied by numerical simulation.The dynamic characteristics and power generation performance of the static and tri-stable motion-stimulus systems are analyzed.The tri-stable system is more likely to undergo large motion and better power generation performance at lower flow rates.The influence of parameters of the tri-stable system on the power generation performance of the galloping energy trap is further studied.
作者
谭红波
刘丽兰
薛白鸽
Tan Hongbo;Liu Lilan;Xue Baige(Schoolof Mechanical and Instrumental Engineering,Xi'an University of Technology,Xi'an 710048,China)
出处
《机械科学与技术》
CSCD
北大核心
2020年第10期1539-1546,共8页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(11572243)资助。
关键词
三稳态
驰振
能量捕获
动力学响应
发电性能
tristable
galloping
energy capture
dynamic response
power generation performance
