Diseño y Simulación de un acumulador de energía vibracional piezoeléctrica para aplicaciones ferroviarias.

Abstract

In the present thesis, the performance of a piezoelectric energy accumulator generated by a passing train was investigated analytically. The piezoelectric assembly was represented in the conventional railroad track with the help of SolidWorks software, an equivalent model was made through a system of masses, springs and dampers with two degrees of freedom, in order to obtain the mathematical model of the system, and then proceed to simulate it in Matlab software. In order to carry out the simulation, certain parameters were required, both of the railroad track and the piezoelectric, for which by means of investigations carried out, these parameters could be obtained and in this way the simulation was executed. The results are shown in the frequency spectrum, in a range from 0 Hz to 100 Hz because it is of interest the low frequencies generated by the wheel-rail contact, in first instance a power response of 0.075 mW and an RMS voltage of 275.17 V at the highest peak of 42.42 Hz was obtained, then the main parameters were varied and simulated in order to see if somehow could be obtained higher power gains. Then we proceeded to validate the results of power and voltage with values obtained from other authors, finally, each result obtained was analyzed in order to optimize the maximum power response, it was observed that by increasing a parameter of the piezoelectric (force factor) could get to have high power values, for this involves sizing the area and thickness of the piezoelectric.