Investigação Experimental do uso de Fios de Nitinol para Controle de Vibrações em Rotores Flexíveis
Keywords: Shape Memory Alloys, flexible rotor, vibration control
AbstractRotating systems are subject to vibrations due to the presence of external or internal sources and this causes damage to the health of the equipment and tends to generate high maintenance costs. As an alternative to solve this type of problem, vibration attenuators can be used, allowing the equipment to work safely. Currently, several attenuation methods have been investigated for monitoring the functioning of mechanical structures, especially compact attenuating systems, such as, for example, those that use shape memory alloys. In this context, the present work presents the passive control of vibrations of a flexible rotor using nitinol wires heated by electric current. The displacements of the bearing in which the wires act are analyzed for different heating temperatures and compared to the rotor without the actuator. By analyzing the experimental results, we note the efficiency in reducing the amplitude, in addition to changing the natural frequency, making the safer system.