ACOUSTIC POWER RADIATION FROM A RECTANGULAR PLATE WITH MIXED BOUNDARY-CONDITIONS

The total average acoustic power radiation from one side of a baffled rectangular flat plate, vibrating in its natural modes under two oppos ing ends fixed and the other two ends simply supported boundary condit ions, has been investigated. Numerical results on the acoustic power r adiation by the plate have been obtained for various mode orders, aspe ct ratios, and thickness ratios. Expressions for the acoustic power ra diation by plates under specific edge restraints have been derived in terms of the far-field acoustic pressure distribution.