(S4)Minimization of Sound Radiation Power from a Plate by Adding Dimples.

The design sterategy to add ruggedness on thin plate so as to decrease noise power radiating from the plate has been investigated. For an example, modal analysis and soun radiation analysis of a rectangular plate with a rectangular ruggedness were carried out and the opimization of position and dimensions of the ruggedness to minimize the sound radiation power was discussed.

Fig.1 Fig.2
Finite Element Model of a Rectangular Plate with a Ruggness Sound Radiation Power of a Rectangular Plate with an Optimum Ruggness

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