移动车辆桥梁系统中的振动能量获取  

PIEZOELECTRIC ENERGY HARVESTING IN MOVING-VEHICLE BRIDGE SYSTEM

作　　者：朱培[1] 任兴民[1] 秦卫阳[1] 杨永锋[1] 王元生[1] 周志勇[1] Zhu Pei;Ren Xingmin;Qin Weiyang;Yang Yongfeng;Wang Yuansheng;Zhou Zhiyong(School of Mechanics and Civil ＆ Architecture,Northwestern Polytechnical University,Xi＇an 710072,China)

机构地区：[1]西北工业大学力学与土木建筑学院,西安710072

出　　处：《动力学与控制学报》2018年第4期361-369,共9页Journal of Dynamics and Control

基　　金：国家自然科学基金(11672237;11272257);航空科学基金(2013ZB08001);航天科技创新基金(2016kc060013);中央高校基本科研业务费(3102016ZY016)资助项目~~

摘　　要：本文对移动车辆作用下桥梁系统的振动能量俘获进行了研究.将车辆模型简化为车轮--弹簧--阻尼器--簧上车身质量体系,桥梁简化为对边简支对边自由板模型,压电俘能结构采用粘贴有压电晶体材料的悬臂梁并在其末端附加一质量块.对于这个耦合动力学模型,首先,通过板壳振动理论推导出了移动车辆作用下板的运动微分方程;其次,根据欧拉伯努利梁振动理论和基尔霍夫第一定律得到了以桥梁振动响应作为激励的悬臂梁动力学--压电耦合方程;最后,对耦合运动微分方程进行了求解并对其数值模拟结果进行了分析.结果表明:采用设计的压电俘能结构可以有效地收集桥梁系统的振动能量,而压电装置的位置、压电梁的厚度、集中质量、车辆速度对压电俘能效率都有一定影响.In this paper,the vibration energy harvesting for a bridge system under moving vehicles is studied.The vehicle model is simplified as a wheel-spring-damper system,and the bridge is regarded as opposite side simply-supported plate. The piezoelectric structure is composed of cantilever beam pasted with piezoelectric material and an additional mass at the end of beam. For the coupled dynamic model,first of all,differential equations of plate motion under moving load are derived from the theory of the plate vibration. Secondly,the piezoelectric coupling dynamic equation of the cantilever beam excited by the response of the bridge vibration,based on Euler Bernoulli beam theory and Kirchhoff＇s first law,is obtained. Finally,the coupled differential equations of motion are solved,and the numerical simulation results are analyzed. The results show that the design of the piezoelectric structure can effectively collect the vibration energy of bridge system,and the piezoelectric device position,piezoelectric beam thickness,lumped mass,vehicle speed of piezoelectric had some effects on the energy harvesting efficiency.

关 键 词：振动响应 俘能 压电 桥梁 

分 类 号：U441[建筑科学—桥梁与隧道工程]