We were honored to have Ameer Ambavaram from Mercury Marine present at the SIMULIA Americas Users Conference, May 3-4, 2023 in Novi, Michigan.
Abstract: An intake silencer is widely used in internal combustion engines to reduce the air-borne noise generated from the pressure pulsations in the intake system. The designing of silencer is a critical factor for attenuating the intake noise at specific frequencies which engine emit. The performance of intake silencer is evaluated from the transmission loss. The transmission loss of the silencer is generally calculated from the inlet and outlet pressures predicted from Abaqus analysis on acoustic medium only, without including structure. This paper illustrates the effect of coupling between a structure and acoustic medium to calculate the transmission loss. When the structural modes interact with acoustic modes, it would change the frequency response which will affect the performance of the silencer. The fully coupled analysis in Abaqus solves these kinds of problems using direct-steady state dynamic analysis with fully structural acoustic coupling. The coupled analysis of an intake silencer has been presented in this paper and the results are compared between the coupled model and air core model and both are compared with empirical results.
Bio: Ameer Ambavaram is a technical specialist in Noise and Vibration analysis at Mercury Marine (a division of Brunswick Corporation).
He is specialized in performing durability analysis on the marine engine components subjected to vibration loads with modal and forced response analysis and also performs structure-borne noise and intake silencer noise attenuation analysis. He has over 17 years’ experience in Finite Element Analysis and primarily working in Abaqus and fe-safe tools.
