+44 (0)1509 263171
Please use this identifier to cite or link to this item:
|Title: ||Optimisation of the structural modes of automotive-type panels using line stiffeners and point masses to achieve weak acoustic radiation|
|Authors: ||Rousounelos, Andreas|
Walsh, Stephen J.
Krylov, Victor V.
Horner, Jane L.
|Keywords: ||Structural–acoustic optimisation;|
|Issue Date: ||2015|
|Publisher: ||© Elsevier Ltd.|
|Citation: ||ROUSOUNELOS, A. ... et al., 2015. Optimisation of the structural modes of automotive-type panels using line stiffeners and point masses to achieve weak acoustic radiation. Applied Acoustics, 93 (June 2015), pp. 23 - 37.|
|Abstract: ||In this paper, an optimisation method is presented that turns the structural modes of an automotive-type panel into weak acoustic radiators. The advantage of the proposed method is that the optimum design does not depend upon a specific excitation mechanism. Hence, the optimised panel can be used in the early stages of vehicle product design when specific knowledge about the excitation forces is not available. In the proposed method the boundary conditions of the panel are specified such that the panel can be considered in isolation from the rest of the structure. The optimisation of the structural modes of the panel is then achieved by placing a number of constraint masses and stiffeners of optimum size and weight at optimum locations on the plate. Firstly, a theoretical model of a simply-supported plate is developed that takes into account the constraints at arbitrary positions and orientations. Then a genetic algorithm is used to minimise the sound power radiated by different modes on the plate by finding the optimum design for the constraints. Secondly, the use of added masses and stiffeners is then applied to a floor panel of a simplified model of a vehicle body structure in order to reduce the radiated sound. Predicted and experimental results of the radiated sound power from a reference flat panel and from various optimised panel designs are presented to illustrate the effectiveness of the optimised designs in reducing radiated sound from the structure. A combination of masses and stiffeners is shown to be an effective way of constructing weakly radiating structural modes on the panel.|
|Description: ||This paper was accepted for publication in the journal, Applied Acoustics [© Elsevier Ltd.] and the definitive version is available at: http://dx.doi.org/10.1016/j.apacoust.2015.01.001|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1016/j.apacoust.2015.01.001|
|Appears in Collections:||Published Articles (Aeronautical and Automotive Engineering)|
Files associated with this item:
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.