Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
HVAC duct system modeling through the component mode synthesis for structural vibration analysis
Submission Author:
Jose Manuel Bautista Ordoñez , DF
Co-Authors:
Jose Manuel Bautista Ordoñez, Maria Alzira de Araújo Nunes
Presenter: Hugo Ferreira Moore
doi://10.26678/ABCM.COBEM2017.COB17-2738
Abstract
HVAC systems (heating, ventilating and air conditioning) are responsible for making an environment remain within a desirable range of temperature, humidity and cleanliness. To get the desire environment, the HVAC systems uses a set of rigid ducts with different cross section. In addition to increasing the comfort in industrial spaces, is emphasized the importance of the structural analysis, referring to the vibratory behaviour, in this way avoiding the occurrence of phenomena such as resonance. In the field of structural dynamics, the finite element method (FEM) is becoming increasingly important to industry. Attempting to reduce the size and time response of different complex models on numerical software, component mode synthesis (CMS) is one of the main techniques for modelling complex or large sized systems. The present work uses an application of the CMS in modal analysis of an HVAC duct system. In order to analyse the structural vibrational behaviour the CMS uses a modal superset that consists in to modelling individual components of a structure separately and then to couple them to form an assembled system. The principal objective of this article is to use the CMS technique for analytical estimation of natural frequencies and vibration modes of a duct system. Such system is composed of two or more substructures with the CMS technique using the software Matlab®. The validation of the analytical results was accomplished through a numerical model using the software Ansys®. The results obtained allowed to demonstrate the feasibility of applying the CMS for analysis of structural vibration in HVAC systems.
Keywords
Component mode synthesis, Natural frequency., modal analysis, HVAC system
