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Piezoelectric Energy Harvesting from Beam Vibration Subjected to Moving Mass

Asgharzadeh, Mostafa | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54304 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Mofid, Masood; Dehestani, Mehdi
  7. Abstract:
  8. In this thesis, the energy harvesting from the vibration of a simply supported beam under the influence of a moving object has been evaluated by a cantilevered piezoelectric beam. For beam, two models with surface unevenness and without surface unevenness are considered, and for a moving object, three models have been considered, namely moving load and two models of moving mass with Coriolis acceleration and without Coriolis acceleration. Parametric analysis was performed to evaluate the performance of various parameters in energy harvesting and the effect of harvesting properties such as location, tip mass and electrical resistance, moving object properties such as speed and weight, beam properties such as moment of inertia, distributed mass per unit length, span of beam and properties of unevenness was assessed. The results showed that in the case without considering the surface unevenness, the most energy will be harvested when the harvester frequency and the beam are tuned. When surface unevenness is considered, the maximum energy harvesting occurs when the three frequencies of the harvester, beam and surface unevenness are tuned. In the case of no surface unevenness, at speeds of less than 45 meters per second, the difference between the three models reaches a maximum of 13.9%. When the speed is increased, the difference between the three models is increased, so for speed up to 170 meters per second, the maximum energy harvested in the moving mass model is increased by 44.31% compared to the moving load model and the maximum energy harvested in the moving mass model with Coriolis acceleration is 34.45% higher than the moving mass model without Coriolis acceleration. When the surface unevenness is taken into account, the energy harvested is greatly increased. Also in this case, depending on the surface unevenness characteristics, the effect of higher modes of beam may be not negligible
  9. Keywords:
  10. Piezoelectric Energy Harvester ; Moving Loads ; Beam Vibration ; Cantilever Piezoelectric Beam ; Traveling Mass

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