DYNAMIC ANALYSIS OF AN AIR HANDLING UNIT
Keywords:
Vibration analysis, Finite element analysis, Operational deflection shape, Experimental modal analysis, Air handling unitAbstract
In this paper, vibration methods were conducted for an air-handling unit (AHU) assembly that experiences a vibration-related problem. The methods that were utilised are the Finite Element Analysis (FEA), the Experimental Modal Analysis (EMA) and the Operating Deflection Shapes (ODS). Mathematical and analytical modelling were also done before the experimental methods where they are used as reference for estimation of the results. Results between the theoretical and experimental methodologies were compared for analysis. The corresponding mode shapes were used as reference for finding the relevant experimental mode shapes of the AHU. The ODS results show the belt pulley system that connects the motor and the fan of the AHU experienced a strong axial vibration as supported by the initial vibration testing results. It was hypothesised that the AHU might be suffering from belt misalignment problem that introduces vibration to the whole AHU structure resulting in high vibration displacements.References
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