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• W129463921 abstract "The problem of the effect of structural modifications on sound radiation from a structure is very important with many applications in the design of a variety of products. In practise, for the design of acoustically optimum structures simplified theoretical models are used which can lead to unexpected behaviour of the real structures. Alternatively, measurements or numerical simulation can be used. The disadvantage of these two methods is that the study of alternative structures (structures with different properties) is not easy since for every modification a new structure must be manufactured or a new numerical model must be created. Moreover, these two methods do not easily give an insight into the physical mechanisms of sound radiation frommodified structures. In the first part of this thesis the problem of vibration and sound radiation from a plate with an attached beam stiffener is studied theoretically.This extends the current theories of vibroacoustic behaviour of infinite plates with an infinitely long beam discontinuity and infinite plates with an infinite number of equidistant beam discontinuities forming a periodic structure.Firstly, the propagation of flexural waves and the subsequent sound radiation from an infinitely long plate strip is considered. The scattering of plate flexural waves by a finite beam across its width is considered. Changes to the mean square velocity, sound power and radiation efficiency of the platestrip due to the introduction of the beam stiffener are identified. Simplified approximate analytical expressions for the low-frequency range, well belowthe critical frequency, are also presented. This model is extended for the case of a finite rectangular plate by incorporating wave reflection from the twoadditional boundaries of the plate. Expressions for the radiation efficiency and the mean squared velocity of the stiffened plate are derived. The resultsare compared with results derived using well established numerical methods.For structures with more complicated modifications the derivation of analytical expressions is not easy. For this reason numerical optimisation isoften used. In this thesis numerical optimisation is used to optimise the modes of a structure in order to radiate acoustic energy weakly into theacoustic medium. The effectiveness of point mass and line stiffener modification to create acoustically optimum modeshapes in a flat simply supported plate is firstly studied. The results show significant reduction in the soundpower radiated by the optimised structural modes. These results are also verified experimentally.This optimisation method has certain advantages when it is used on automotive panels. The main advantage is that the panel under consideration canbe isolated from the rest of the automotive structure and it can be optimised alone. This drastically reduces the time required and makes the optimisation practically applicable. A simplified car model is used and the proposedoptimisation is applied to one of its floor panels. Firstly, point masses andline stiffeners are used as structural modifications to create weakly radiatingmodeshapes. Then more commonly used geometrical modifications are used on the floor panel. Two such modifications are studied; swages and domes. The results show a significant reduction in the radiation effciency and soundpower radiated by the optimised panel." @default.
• W129463921 created "2016-06-24" @default.
• W129463921 creator A5077206927 @default.
• W129463921 date "2010-01-01" @default.
• W129463921 modified "2023-09-28" @default.
• W129463921 title "Reduction of Sound Radiation from Automotive-Type Panels" @default.
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• W129463921 cites W1579900883 @default.
• W129463921 cites W1590105667 @default.
• W129463921 cites W1650161607 @default.
• W129463921 cites W1737761646 @default.
• W129463921 cites W177023738 @default.
• W129463921 cites W1972546862 @default.
• W129463921 cites W1974173334 @default.
• W129463921 cites W1975996944 @default.
• W129463921 cites W1976855080 @default.
• W129463921 cites W1978210205 @default.
• W129463921 cites W1981449439 @default.
• W129463921 cites W1982452854 @default.
• W129463921 cites W1984393512 @default.
• W129463921 cites W1988062051 @default.
• W129463921 cites W1992237163 @default.
• W129463921 cites W1997137095 @default.
• W129463921 cites W1997786991 @default.
• W129463921 cites W1998255791 @default.
• W129463921 cites W2001434145 @default.
• W129463921 cites W2003786159 @default.
• W129463921 cites W2008250947 @default.
• W129463921 cites W2009447238 @default.
• W129463921 cites W2012325276 @default.
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• W129463921 cites W2013064427 @default.
• W129463921 cites W2014281640 @default.
• W129463921 cites W2014548066 @default.
• W129463921 cites W2018845260 @default.
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• W129463921 cites W2021036023 @default.
• W129463921 cites W2022978375 @default.
• W129463921 cites W2024480562 @default.
• W129463921 cites W2026103714 @default.
• W129463921 cites W2032683711 @default.
• W129463921 cites W2035754711 @default.
• W129463921 cites W2035938845 @default.
• W129463921 cites W2036612564 @default.
• W129463921 cites W2036685807 @default.
• W129463921 cites W2037845628 @default.
• W129463921 cites W2037981477 @default.
• W129463921 cites W2042972535 @default.
• W129463921 cites W2044428719 @default.
• W129463921 cites W2051603937 @default.
• W129463921 cites W2056215075 @default.
• W129463921 cites W2058143740 @default.
• W129463921 cites W2060871392 @default.
• W129463921 cites W2063883656 @default.
• W129463921 cites W2066650510 @default.
• W129463921 cites W2066887867 @default.
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