压电悬臂梁结构参数对摩擦自激振动能量收集的影响  

Effect of piezoelectric cantilever beam’s structural parameters on energy harvesting of friction-induced vibration

作　　者：朱瑞丹[1] 刘方平 何冬康 项载毓 ZHU Ruidan;LIU Fangping;HE Dongkang;XIANG Zaiyu(Faculty of Mechanical&Electrical Engineering,Liuzhou Vocational&Technical College,Liuzhou 545000;School of Mechanical Engineering,Guangxi University,Nanning 530004)

机构地区：[1]柳州职业技术学院机电工程学院,广西柳州545000 [2]广西大学机械工程学院,广西南宁530004

出　　处：《机械设计》2025年第3期132-142,共11页Journal of Machine Design

基　　金：国家自然科学基金项目(52305187);广西高校中青年教师科研基础能力提升项目(2020KY31017,2024KY1093)。

摘　　要：针对滑动摩擦副普遍存在的摩擦自激振动问题,尝试通过安装压电悬臂梁振动能量收集器以实现摩擦自激振动能量的收集。基于CETR摩擦磨损试验机开展了摩擦自激振动能量收集试验,建立该试验装置的有限元模型及含压电悬臂梁振动能量收集器的5自由度数值模型,探讨了悬臂梁结构参数变化对压电陶瓷输出电压的影响。结果表明:设计的压电悬臂梁振动能量收集器可有效地将摩擦块∕摩擦盘滑动摩擦产生的摩擦自激振动能量转换为电能,而且悬臂梁质量和刚度等结构参数通过改变压电悬臂梁振动能量收集器的变形能力以影响摩擦自激振动能量收集效果;悬臂梁质量和刚度较小时,压电悬臂梁振动能量收集器具有较好的变形能力,使得压电陶瓷更好地将摩擦自激振动能量转换为电能;随着悬臂梁质量和刚度的增大,压电悬臂梁振动能量收集器的变形能力减弱,导致压电陶瓷输出电压减小。Since friction-induced vibration(FIV)commonly occurs in sliding friction pairs,in this article a vibration energy collector via a piezoelectric cantilever beam is installed to harvest the FIV energy.The experiment of FIV energy harvesting is conducted through the CETR friction-and-wear test setup.Also,efforts are made to build the test setup’s finite-element model and the five-degree-of-freedom numerical modal containing the vibration energy collector via a piezoelectric cantilever beam.Then,the effect of the cantilever beam’s ever-changing structure parameters on the output voltage of piezoelectric ceramics is explored.The results show that the vibration energy collector via a piezoelectric cantilever beam effectively converts the FIV energy generated by block∕disc sliding friction into the electric energy.The cantilever beam’s structural parameters,such as mass and stiffness,affect the effect of FIV energy harvesting by changing the vibration energy collector’s deformation capacity.When the piezoelectric cantilever beam with small mass and stiffness,the vibration energy collector has excellent deformation ability;as a result,the FIV energy can be better converted into the electric energy by piezoelectric ceramics.With the increase of the cantilever beam’s mass and stiffness,the vibration energy collector’s deformation capacity weakens;consequently,the output voltage of piezoelectric ceramics decreases.

关 键 词：摩擦自激振动 压电悬臂梁 能量收集 有限元仿真 数值分析 

分 类 号：TM619[电气工程—电力系统及自动化]