传感技术学报2025，Vol.38Issue(11)：1955-1962,8.DOI:10.3969/j.issn.1004-1699.2025.11.005
含钝体压电梁的电学输出响应研究
Research on Electrical Output Response of Piezoelectric Beam with Bluff Body
摘要
Abstract
To address the output characteristics of a piezoelectric vibration energy harvesters,the influence of hybrid excitation on the electrical response of piezoelectric vibration energy harvesters with bluff body is focus on.Based on the Euler-Bernoulli elastic beam vi-bration theory,an electromechanical coupled dynamic model is formulated for the piezoelectric beam under the influence of both wind and base excitations.The model considers the integral form relationship between the vibration displacement and the output voltage of the piezoelectric beam,derived based on Gauss's law.By utilizing the Galerkin method,the coupled electromechanical dynamic model and the output voltage equations are simplified to a single-degree-of-freedom electromechanical coupled dynamic equation group.The ap-proximate expressions for the vibration response and the electrical output response of the piezoelectric beam are obtained through a methodology that separates the mechanical and electrical coupling terms.The impact of base-excitation acceleration and wind speed on the output response of the piezoelectric beam is examined.The results indicate that the electrical output response in the synchronous re-gion is predominantly influenced by the acceleration resulting from base-excitation,and the presence of wind speed also enhances the re-sponse in the synchronous region.During vibration,the response contributed by galloping only manifests in the non-synchronous region,owing to the"extinction"phenomenon.Galloping significantly amplifies the response in the non-synchronous region when it occurs.For the base-excitation acceleration amplitude of 0.1 gn,0.2 gn,and 0.3 gn,the average voltage amplitude relative to U=3 m/s increases by 113.92%,61.55%,and 25.01%,respectively,with a wind speed of U=8 m/s.关键词
能量俘获器/压电梁/混合激励/电学输出响应Key words
energy harvester/piezoelectric beam/hybrid excitation/electrical output response分类
数理科学引用本文复制引用
何思鹏,刘文光,成龙,高铭阳..含钝体压电梁的电学输出响应研究[J].传感技术学报,2025,38(11):1955-1962,8.基金项目
国家自然科学基金项目(51965042) （51965042）
江西省研究生创新基金项目(YC2023-S718) （YC2023-S718）
