EVALUATION OF ANALYTICAL AND FINITE ELEMENT MODELING ON PIEZOELECTRIC CANTILEVER BIMORPH ENERGY HARVESTER

2013 ◽  
Vol 37 (3) ◽  
pp. 621-629 ◽  
Author(s):  
Long Zhang ◽  
Keith A. Williams ◽  
Zhengchao Xie
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Analytical Model ◽  
Energy Harvester ◽  
Electrical Energy ◽  
Working Environment ◽  
Dynamic Responses ◽  
Power Sources ◽  
Element Modeling ◽  
Piezoelectric Cantilever

Harvesting the electrical energy from their working environment has become a feasible choice of realizing self-powered systems or providing supplementary power sources to the battery. In this paper, a pre-loaded piezoelectric cantilever bimorph (PCB) energy harvester is adopted as the research object, for which a single degree-of-freedom analytical model and finite element modeling have been carried out to study its dynamic responses. The laboratory experiments have also been performed to validate the analytical and the finite element modeling. It shows that finite element modeling has a better agreement with the experimental results than the analytical model, while the latter has a rough accuracy and can be used to obtain quick estimations of the dynamic response of the PCB energy harvester in certain cases.

scholarly journals Study of the Hershel-Quinke Resonator

2020 ◽  
Vol 320 ◽  
pp. 00025
Author(s):  
Veronika Nikolaeva ◽  
Alexandr Komkin
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Analytical Model ◽  
Transmission Loss ◽  
Geometric Parameters ◽  
Numerical Calculations ◽  
Element Modeling

In this paper, the transmission loss of a Herschel-Quincke resonator is investigated. An analytical model of such a resonator is considered. The finite element modeling of the resonator has also been carried out. It is shown that the resonance peaks of the transmission loss spectrum in the analytical model are shifted relative to the results of numerical calculations, as a result of which it is necessary to introduce corrections for the length of the resonator tubes into the analytical model. The amendments made it possible to correct the results of analytical calculations, ensuring their reliability. The dependence of the resonator bandwidth as a function of its geometric parameters is investigated.

Fatigue Damage Prognostics and Life Prediction with Dynamic Response Reconstruction Using Indirect Sensor Measurements

2013 ◽  
pp. 376-390
Author(s):  
Jingjing He ◽  
Xuefei Guan ◽  
Yongming Liu
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Monitoring System ◽  
Fatigue Damage ◽  
Life Prediction ◽  
Dynamic Responses ◽  
Element Modeling ◽  
Mode Decomposition ◽  
Response Reconstruction ◽  
Critical Locations

This study presents a general methodology for fatigue damage prognostics and life prediction integrating the structural health monitoring system. A new method for structure response reconstruction of critical locations using measurements from remote sensors is developed. The method is based on the empirical mode decomposition with intermittency criteria and transformation equations derived from finite element modeling. Dynamic responses measured from usage monitoring system or sensors at available locations are decomposed into modal responses directly in time domain. Transformation equations based on finite element modeling are used to extrapolate the modal responses from the measured locations to critical locations where direct sensor measurements are not available. The mode superposition method is employed to obtain dynamic responses at critical locations for fatigue crack propagation analysis. Fatigue analysis and life prediction can be performed given reconstructed responses at the critical location. The method is demonstrated using a multi degree-of-freedom cantilever beam problem.

Finite Element Modeling and Experimental Verification of a Suspension Electromagnetic Energy Harvester

2013 ◽  
Vol 444-445 ◽  
pp. 879-883 ◽  
Author(s):  
Shi Wei Guan ◽  
Xiao Biao Shan ◽  
Tao Xie ◽  
Ru Jun Song ◽  
Zhen Long Xu
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Power Output ◽  
Energy Harvester ◽  
Structural Parameters ◽  
Electromagnetic Energy ◽  
Experimental Results ◽  
Peak Power Output ◽  
Element Modeling ◽  
Finite Element Software

The power output characteristics of an electromagnetic energy harvester which uses magnetic levitation to produce the nonlinear vibration were investigated in this paper. A finite element model was developed in the electromagnetic finite element software MAXWELL®. The results show that the power output of the harvester was strongly influenced by its external loads and structural parameters. The experimental results show that the peak power output of the electromagnetic harvester is 8.2 mW at the resonance of 8.5 Hz under the vibration acceleration of 5m/s2. That obtained from the finite element analysis is 8.5 mW at 8.4Hz. The experimental results effectively verify the validity of the finite element modeling.

Finite element modeling of flexible piezoelectric energy harvester operating in air

2019 ◽  
Vol 2019.32 (0) ◽  
pp. 279
Author(s):  
Prakasha Chigahalli RAMEGOWDA ◽  
Daisuke ISHIHARA ◽  
Rei TAKATA ◽  
Tomoya NIHO ◽  
Tomoyoshi HORIE
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Energy Harvester ◽  
Element Modeling ◽  
Piezoelectric Energy

Forced Response of Disks due to Distributed Pressure Fields

2001 ◽  
Author(s):  
A. H. Mohamad ◽  
J. Ravoux ◽  
G. Jacquet-Richardet
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Analytical Model ◽  
Forced Response ◽  
Major Influence ◽  
Finite Element Models ◽  
Circular Plates ◽  
Element Modeling ◽  
Pressure Fields ◽  
Distributed Pressure

Abstract The shape and the frequency of excitation, induced by distributed pressure fields, have both a major influence on the associated response of bladed disks. The way those pressure fields are considered by finite element models have then to be as accurate as possible. In this paper, an analytical model, adapted to the prediction of the forced response of clamped-free circular plates, due to distributed pressure fields, is first derived. This model is considered as a reference in order to assess the effectiveness of different finite element modeling.

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