VALIDACION EXPERIMENTAL DEL AMORTIGUAMIENTO CRÍTICO PARA EL TERCER MODO DE VIBRACIÓN

Abstract

It seeks to develop a methodology to detect cracks that we can identify, inspect a crack in the shaft before the critical size that allows its rupture. This is due to the production of acquired signals in real time, simulating the various faults that may occur in systems such jeffcot to determine whether an axis can be permanently damaged without arrest or carry repair machinery. Allowing be applied to any machine and analyze their dynamic responses and determine the structural-axis. It seeks to develop the instrumentation system capable of achieving diversity of parameters and observe changes in the physical variables of the system, such as acceleration and displacement acquire sufficient data to allow us then a complete analysis of our system. There are several nondestructive testing techniques for detecting cracks. Exanimación such as visual, radiographic, ultrasonic testing, fluid penetration tests, X-ray tests and magnetic particle testing. However these tests are often too expensive and can not be used while the machinery is in operation. Therefore a good choice for monitoring System is developed both physical and virtual instrumentation capable of displaying to the researcher or user of the system changes in the physical system variables such as displacement and acceleration through the voltage difference that give us our transducers and display programs developed. This is one of the main contributions of this thesis implemented in full in the laboratory of vibration on the system rotodynamic Machine Fault Simulator. Experiments and simulations to demonstrate the effectiveness of our modeling for the detection of crack in a rotating machine. By the numerical results obtained from theoretical and experimental measurements of the vibratory response. Laboratory experiments as the results obtained validate the proposed numerical simulations and practical techniques in the industry for detecting cracks.