Abstract
The impulse response of an infinite regularly ribbed fluid‐loaded panel is used to calculate the spectral response and radiation efficiency of these structures when they are excited by mechanical (line) drives. The linear response quantities, pressure and velocity, are displayed in the wave‐number‐frequency plane, where the patterns show many interesting features connected with the periodicity of the ribs, the mechanical damping, and the fluid loading. The combination of the linear‐response quantities to form the quadratic quantities, energy and intensity, is discussed. The near‐field and far‐field responses in the fluid are calculated and used to determine the intensity on the panel and in the far field. These quantities are then integrated and used to determine the radiation efficiency of the panel.
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