10477

9672

كارشناسي ارشد

طراحي كاربردي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي مكانيك

1394

ده، 74ص.: مصور، جدول، نمودار

سعيد ضيايي راد، رضا تيكني

1394/07/11

حسن نحوي، حميدرضا ميردامادي

1396/10/04

كتابنامه

مكانيك

مهندسي مكانيك

ID9672

به فارسي و انگليسي

73 Energy Harvesting from Bridge Vibration under Moving Mass Masoud Karimi Email masoud karimi@me iut ac ir Date of submission August 18 2015 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language Farsi Supervisor Saeed Ziaei Rad Email szrad@cc iut ac ir Supervisor Reza Tikani Email r tikani@cc iut ac irAbstract Piezoelectric based energy harvesting is an efficient way to convert ambient vibration energy into usableelectric energy The piezoelectric harvester can work as a sustainable and green power source for differentelectric devices such as sensors and implanted medical devices However its application on civil infrastructureshas not been fully studied yet This dissertation aimed to study and improve the piezoelectric based energyharvesting on civil infrastructures especially on bridge structures To reach the objective a more accuratemodel for piezoelectric composite beams was built first which can be adopted for the modeling of differentkinds of energy harvesters The apparatus consists of a cantilevered beam harvester with a piezoelectric patch Acoupled electromechanical modal model based on Euler Bernoulli theory was used The model includes bothdirect and inverse piezoelectric effects and can provide a better prediction for the dynamic response and energyoutput of a harvester In order to validate the model the piezoelectric energy harvester was fabricated and somemodal tests were performed In the next step the formulation regarding to an Euler Bernoulli beam undermoving mass by considering effects of inertial coriolis and centripetal forces was derived by using Newtonmethod Next the equations were developed for an elastic moving beam For verifying the results of thenumerical solution of the moving mass problem were compared to the experimental tests data of the litterature Then the piezoelectric energy harvesting from a bridge structure under moving point mass and distributed masswith different speeds was studied theoretically and experimentally Furthermore analytical and numericalinvestigation of a cantilevered beam type harvester with a piezoelectric patch under band limited ambientrandom acceleration as the input was validated by experiment The harvested electric energy can be used topower the energy needs for devices such as wireless sensors The focus was to investigate the effect of low amplitude and low frequency bandpass random excitations that is usual in ambient vibrations and it could bemore realistic spectra for excitations as compared to Gaussian white noise on a harvester Keywords Smart structures Energy harvesting Piezoelectric patch Model validation Moving mass Random vibrations

سعيد ضيايي راد، رضا تيكني

حسن نحوي، حميدرضا ميردامادي