Abstracts Submitted: 510
Number of Users: 710
View Abstracts Submitted
Back to home Page
Interior noise prediction in cavities of automobile is of an increasing significance due to the light weight design of structure. Accurate coupled vibro-acoustic model of such cavities are required to analyze interior noise and structural vibrations of cavities. Uncertainties associated with modeling of boundary conditions, joints, damping and acoustic absorption properties of cavity surfaces in acoustic domain, must be taken into account in order to improve the accuracy and reliability of such vibro-acoustic cavities. Finite element model updating techniques are used to reduce modeling inaccuracies present in the FE model. This paper presents experimental studies in updating of FE model of vibro-acoustic cavity. The coupled vibro-acoustic cavity model is updated in two steps. In the first step update structural parameters of the model using coupled IESM method and in the second step, update acoustic parameters of the model using coupled FRF based constrained optimization method. Experimental example of a 3D rectangular-box cavity with a flexible plate is presented. The studies demonstrate that the improvement of the vibro-acoustic FE models through FE model updating can be an effective approach to obtain more accurate vibro-acoustic predictions.
© Copyright 2017 All Rights Reserved