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Duochang Ren
Author with expertise in Analysis and Control of Axially Moving Dynamics
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Energy harvesting from vibration of stay cables using polyvinylidene fluoride materials: Experimental investigations

Shengli Li et al.Nov 1, 2024
Piezoelectric energy harvesters (PEHs) have garnered significant attention due to their potential to scavenge ambient vibration energy. However, their application to stay cables presents unique challenges. To evaluate the efficacy of PEHs for cable vibration energy harvesting, this paper conducts field tests on the designed cable polyvinylidene fluoride piezoelectric energy harvester (CPPEH) based on laboratory research. The effects of external load resistance, stay cable parameters, mounting position of the polyvinylidene fluoride (PVDF) piezoelectric film, orientation of the piezoelectric devices, polydimethylsiloxane (PDMS) flexible substrate, and stability of the piezoelectric devices on the energy output performance of CPPEH were studied. Results indicate an optimal resistance of 0.24 MΩ for the CPPEH configuration employing four piezoelectric films connected in parallel. The CPPEH exhibited superior energy performance in the in-plane and vertical installation on the stay cable. Optimal energy harvesting efficiency was achieved with a stay cable length of 91.99 m at an inclination angle of 48.879°. The PDMS flexible substrate enhanced the piezoelectric potential of the CPPEH, while the designed CPPEH demonstrated excellent cyclic stability. This innovative approach introduces a sustainable energy solution for solid bridge cable-stayed structures and offers substantial environmental and economic benefits to bridge infrastructure, offering significant engineering and societal value.