Winkler地基梁中压电能量收集的理论研究  

THEORETICAL STUDY ON PIEZOELECTRIC ENERGY HARVESTING IN WINKLER FOUNDATION BEAMS

作　　者：阮可心 RUAN Kexin(Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China)

机构地区：[1]浙江大学建筑工程学院

出　　处：《低温建筑技术》2019年第8期99-101,共3页Low Temperature Architecture Technology

摘　　要：为探究压电俘能装置在常见土木工程结构中的应用,文中建立了将片式压电俘能装置贴于Winkler地基梁底部的能量收集理论,研究了输出功率与压电片长度、压电片位置、地基刚度、外接电阻、激励频率间的关系。通过无量纲分析,得到当激励频率接近共振频率时,输出功率达到极大值,地基刚度越大,一阶共振频率越大;压电片位于梁中间,且长度越长时,输出功率较大;让输出功率达到最大的外接电阻与压电片参数和激励频率有关。结合实际结构和材料特征,合理分布压电片、设置外接电阻大小时,压电片俘能功率密度为1.25W/m2左右。In order to explore the application of piezoelectric energy harvesting device in common civil engineering structures, this paper establishes a theory of the chip piezoelectric energy harvesting device attached to the bottom of the winkler foundation beams, and studies the relationship between the output power and the length, the position of the piezoelectric chip, the stiffness of the foundation, the load resistance and the excitation frequency. Through the dimensionless analysis, following conclusions can be obtained. When the excitation frequency is close to the resonance frequency, the output power reaches the maximum value. The greater the foundation stiffness, the larger the first-order resonance frequency is. When the piezoelectric chip locates in the middle of the beam, and the longer the length, the output power is higher. The load resistance that maximizes the output power is related to the geometric and material parameters and the excitation frequency. Combined with the actual structure and material characteristics, when the piezoelectric chip is reasonably distributed and the external resistor is properly set, the power density of the piezoelectric film is around 1.25W per square meter.

关 键 词：WINKLER地基梁 组合梁 PZT 环境俘能 

分 类 号：TU43[建筑科学—岩土工程]