Wavenumber space and physical space responses of a periodically ribbed plate to a point drive : A discrete approach

摘要: Abstract An efficient technique to estimate the vibration of and sound radiation from a stiffened fluid-loaded plate excited by mechanical point force is presented. The process based on formulation in wavenumber domain transversal displacement acoustic pressure fluid domain. Analytical expressions can be easily obtained for these fields case an infinite with stiffeners uniformly spaced. approach consists then using discrete Fourier Transform deduce associated physical space. This transform necessitates truncation sampling adequate criterions avoid loss information aliasing. These are discussed this paper concerning results part “close to” plate. requires relatively small computing time provides tool analyse vibro-acoustic behaviour plate, both, spaces. A comparison between literature some examples presented illustrate validity interests approach.