Experimental and Numerical Study on the Response Characteristics of Piezoelectric Energy Harvester via Friction-induced Vibration

doi:10.3901/JME.2021.09.089

Abstract

Abstract: In view of the common phenomenon of friction-induced vibration in instruments, the feasibility of using piezoelectric method to collect friction-induced vibration energy is discussed by using experimental analysis and numerical simulation. In this work, an experimental device which can generate friction-induced vibration and simultaneously convert vibration energy into electrical energy by using piezoelectric materials is established. The experimental results verify the feasibility of using piezoelectric materials to collect friction-induced vibration energy. The experimental process is simulated in the finite element software ABAQUS. Firstly, the response characteristics of the piezoelectric energy collector are analyzed by using the complex eigenvalue analysis method. The results show that the unstable vibration mode in the normal direction and tangential direction of the friction system plays an important role in realizing the collection of friction-induced vibration energy. In addition, transient dynamic analysis is performed to detect the dynamic response of the friction system, the results show transient analysis can well simulate the test process in time domain. The larger normal load will cause the friction system to generate stronger vibration, resulting in the deformation displacement of piezoelectric materials increases, and accordingly output higher voltage. The friction system has a certain critical speed, which enables the system to produce the strongest friction vibration energy and output the maximum voltage signal. Furthermore, a two-degree-of-freedom mathematical model which couples the friction and piezoelectric is established, results verify the feasibility of the energy harvesting via friction-induced vibration, and qualitatively analyzes the influence of normal load and velocity on the system response. The above results can provide theoretical basis for energy collection of friction vibration.

Key words: friction-induced vibration, energy harvesting, piezoelectric, experimental study, finite element analysis

CLC Number:

TH117

WANG Dongwei, LIU Mingxing, WU Xiao, QIAN Weiji. Experimental and Numerical Study on the Response Characteristics of Piezoelectric Energy Harvester via Friction-induced Vibration[J]. Journal of Mechanical Engineering, 2021, 57(9): 89-98.

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