Experimental study on active damping of compressor blade forced vibrations using piezoelements

Experimental Investigation on Centrifugal Compressor Blade Crack Classification Using the Squared Envelope Spectrum

Centrifugal compressors are a key piece of equipment for modern production. Among the components of the centrifugal compressor, the impeller is a pivotal part as it is used to transform kinetic energy into pressure energy. Blade crack condition monitoring and classification has been broadly investigated in the industrial and academic area. In this research, a pressure pulsation (PP) sensor arra...

Active Isolation and Damping of Vibrations via Stewart Platform

Acknowledgements In the beginning, I would like to express my sincere gratitude to my supervisor professor André Preumont, the head of the Active Structures Laboratory for his patience, wise advices, brilliant ideas and suggestions and for his strong insistance and high pressure to achieve better work. I would like to thank my colleagues: Frédéric Bossens for putting my feet on the right way, M...

A Mathematical Approach to the Forced Vibrations of the Suspended Compressor Block

Life Estimate of a Compressor Blade through Fractography

Failure analysis of fractured components provides some information about the causes and conditions of fracture. Fractography is an indispensable part of the failure analysis as it is usually the only means by which the failure mechanism can be established. By using fractography, some information such as component’s life, values of the stress intensity factor and the applied stress can be calcul...

Stiff and Soft Stewart Platforms for Active Damping and Active Isolation of Vibrations

As future astronomic missions will require more and more stringent resolution requirements, the high demand for an environment clean of vibrations and disturbance appears. This also leads to the need for high precision steering devices for fine pointing of sensitive optics with the highest possible accuracy. Several methods exist to reduce vibration levels: the first consists in isolating the s...