COBEM99

S21 Vibrações e Análise Modal

Title:

FINITE ELEMENT MODELING AND EXPERIMENTAL INVESTIGATION OF A LINEAR VIBRATORY CONVEYOR (ENSAIOS EXPERIMENTAIS E MODELAGEM POR ELEMENTOS FINITOS DE UM TRANSPORTADOR VIBRATÓRIO LINEAR)

Summary :

THE EFFICIENCY OF VIBRATORY CONVEYOR IS DETERMINED BY THE VELOCITY OF TRANSPORTATION OF THE MATERIAL ALONG ITS TRACK, WHICH IS PRIMARILY DETERMINED BY THE TRACK SLOPE, THE FRICTION BETWEEN THE TRACK AND THE TRANSPORTED MATERIAL AND THE EXCITATION CHARACTERISTICS (AMPLITUDE, FREQUENCY AND WAVE FORM). ALTHOUGH MANY STUDIES HAVE ALREADY BEEN PERFORMED, DUE TO THE COMPLEXITY OF THE INTERACTIONS BETWEEN THE COMPONENTS OF THE MECHANICAL SYSTEM, IT IS NOT POSSIBLE, TO DATE, TO PREDICT, IN THE DESIGN PHASE, THE TRANSPORTATION VELOCITY WITH THE REQUIRED ACCURACY. IN THIS CONTEXT, THIS WORK ADDRESSES THE USE A FINITE ELEMENT MODEL TO CHARACTERIZING THE ACTUAL DISTRIBUTION OF DISPLACEMENTS, VELOCITIES AND ACCELERATIONS ALONG THE TRACK. THE ULTIMATE INTEREST IS TO USE THE MODEL IN A GENERAL METHODOLOGY INTENDED FOR THE PREDICTION OF THE TRANSPORTATION VELOCITY AS A FUNCTION OF A VARIOUS DESIGN PARAMETERS. IT IS CONSIDERED A LINEAR CONVEYOR EXCITED BY PRESCRIBED DISPLACEMENTS INTRODUCED BY A ROD-CRANCK MECHAMISM. THE MODEL IS ADJUSTED AND VALIDATED BY COMPARING ITS PREVISIONS TO EXPERIMENTAL DATA OBTAINED THROUGH STATIC AND DYNAMIC TESTS PERFORMED ON A PROTOTYPE. BOTH THE FINITE ELEMENT MODELING AND EXPERIMENTAL PROCEDURES ARE DESCRIBED. THE DISTRIBUITIONS OF A STEADY-STATE HARMONIC RESPONSES, PROVIDED BY FINITE ELEMENT SIMULATIONS ARE COMPARED TO THE EXPERIMENTAL COUNTERPARTS, DEMONSTRATING THE ACCURACY OF THE MODEL.

Author :

Carvalho, João Carlos Mendes
Martins, Roberto de Souza
Rade, Domingos Alves

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