Modelo de auxílio à decisão para seleção de simulador de análise de vibrações mecânicas

Abstract

The subject of mechanical vibrations is extremely relevant in the training of mechanical engineers and in areas such as physics and applied mathematics. Vibration signals carry important information about the operation of a machine. Due to the development of equipment, such as vibration analysis simulators on rotating machines, mechanical vibrations can be studied in engineering teaching laboratories, making it possible to develop several applications and externalize the study to the real world. For each type of equipment needed in a mechanical vibration laboratory, there are different alternatives available on the market. For this reason, choosing the best equipment option can become a complex task, because, in addition to the various options available, you should generally consider multiple criteria in the decision. Selecting equipment inappropriately can be detrimental to organization and to the study of mechanical vibrations. In view of the relevance of making an appropriate decision in the selection of equipment for the study of mechanical vibrations in Mechanical Engineering teaching institutions, this work proposes a model to aid the decision of multiple criteria that allows to assist in the process of choosing a simulator (bench didactic) of vibration analysis in rotating machines. Eight decision criteria for selecting the equipment were proposed and validated with the aid of the Fuzzy Delphi method, of which five were accepted. The accepted criteria were weighted (prioritized), in order to obtain the importance of each one in the selection of the equipment and, for that, the Analytic Hierarchy Process (AHP) method was used. Technical support gained more weight in the selection of the equipment (44.8%), followed by simulated defects (20.5%), warranty (15%), instruments included (14.5%) and equipment price (5.2%). An application of the model was also carried out in order to facilitate the understanding of how to use it, in which, with the aid of the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, the performance of five simulator alternatives was measured vibration analysis, taking into account the weighted criteria and the characteristics of each equipment. The model will be relevant for institutions so that it can be used to structure, facilitate and justify the decision to choose vibration analysis simulators.