湖南大学学报（自然科学版）2018，Vol.45Issue(1)：1-8,8.DOI:10.16339/j.cnki.hdxbzkb.2018.01.001
双自由度磁悬浮式桥梁振动能量采集器数值仿真和优化
Numerical Simulation and Optimization of a Two-degree-of-freedom Magnetic Levitation Vibration Energy Harvester for Bridges
摘要
Abstract
A two-degree-of-freedom magnetic levitation vibration energy harvester(TMEH)was de-signed,which can use the bridge vibration energy to provide continuous power for the sensors.The energy harvesting efficiency of the TMEH is much higher than that of the traditional single-degree-of-freedom magnetic levitation vibration energy harvester(SMEH).Firstly,the motion control equation and the elec-tromechanical coupling equation of TMEH system were deduced.Then,the multi-objective optimization model of TMEH was established,and the design parameters were optimized by using the NSGA2 algo-rithm.Finally,the response characteristics of TMEH and SMEH under the harmonic excitation and normal vehicle-bridge vibration excitation were compared,respectively.The results show that:1)After optimization by the NSGA2 method,TMEH can obtain a wider frequency band and higher output power;2)The energy harvesting efficiency of TMEH is significantly higher than that of the SMEH.Under har-monic vibration excitation and normal vehicle-bridge vibration excitation,the output power of TMEH is about two times higher than that of SMEH.关键词
振动能量采集器/桥梁健康监测/车桥耦合振动/磁悬浮/多目标优化Key words
vibration energy harvester/bridge health monitoring/vehicle-bridge interaction/magnetic levitation/multi-objective optimization分类
信息技术与安全科学引用本文复制引用
邓露,聂新民,毕涛,何维..双自由度磁悬浮式桥梁振动能量采集器数值仿真和优化[J].湖南大学学报（自然科学版）,2018,45(1):1-8,8.基金项目
国家自然科学基金资助项目(51478176),National Natural Science Foundation of China(51478176) （51478176）
湖南省杰出青年基金资助项目(14JJ1014),Excellent Youth Foundation of Hunan Scientific Committee(14JJ1014) （14JJ1014）
