Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Structural vibration analysis of a commercial refrigerator
Submission Author:
Wolfgang Hörtnagel , Austria , Austria
Co-Authors:
Wolfgang Hörtnagel, Fadi Dohnal
Presenter: Wolfgang Hörtnagel
doi://10.26678/ABCM.DINAME2023.DIN2023-0059
Abstract
We focused our examination on the transmission mechanisms of vibration for a commercial refrigerator. Previous studies imply that the biochemical properties of cooled goods are susceptible to vibration. In order to prevent the cooled good's quality from being degraded by external influences it is vital that optimal storage conditions are assured. Protection against ultraviolet light and minimization of vibration are a necessity for conserving quality and prolonging shelf life. We list different excitation sources that showed potential to affect commercial refrigerators and quantify their impact on the system behaviour. We considered the operational behaviour, surrounding influences and human interactions with the refrigerator. Utilizing previous works, we used a novel robust algorithm for operational transfer path analysis and estimated the different transmission paths within the refrigerator and its links to the environment. Operational Deflection Shape analysis allows us to combine the results of the previous Transfer Path Analysis into a mathematical model of our system that enables visualisation of points of interest. The measured data and calculated derivates are then used to propose optimisations in design and control. Finally, we investigate the effectiveness of various measures that either shift resonance frequencies of the refrigerator components into spectral ranges that show lower excitation or introduce additional damping.
Keywords
structural dynamics, Vibrations, System Identification, operational transfer path analysis
