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Effective design of vibro-impact energy harvesting absorbers with asymmetric stoppers

Journal Article · · European Physical Journal. Special Topics
 [1];  [1]
  1. New Mexico State Univ., Las Cruces, NM (United States)

We report that an investigation is carried out for the purpose of simultaneously controlling a base-excited dynamical system and enhancing the effectiveness of a piezoelectric energy harvesting absorber. Amplitude absorbers are included to improve the energy harvested by the absorber with the possibility of activating broadband resonant regions to increase the operable range of the absorber. This study optimizes the stoppers’ ability for the energy harvesting absorber to generate energy by investigating asymmetric gap and stiffness configurations. Medium stiffnesses of 5 x 104 N/m and 1 x 105 N/m show significant impact on the primary system’s dynamics and improvement in the level of the harvested power for the absorber. A solo stopper configuration when the gap distance is 0.02m improves 29% in peak power and 9% in average power over the symmetrical case. Additionally, an asymmetric stiffness configuration when one of the stiffnesses is 1 x 105 N/m and a gap size of 0.02m indicates an improvement of 25% and 8% for peak and average harvested power, respectively, and the second stopper’s stiffness is 5 x 103 N/m. Hard stopper configurations shows improvements with both asymmetric cases, but not enough improvements to outperform the system without amplitude stoppers.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525
OSTI ID:
1855801
Report Number(s):
SAND2022-2459J; 703821
Journal Information:
European Physical Journal. Special Topics, Journal Name: European Physical Journal. Special Topics Journal Issue: 8 Vol. 231; ISSN 1951-6355
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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