Kozien M., Niziol J.

Shallow shells are commonly used as constructional elements in cages of heavy duty machines. These elements, are sources of structural noise radiated during the machine operation. In the previous authors’ papers the analysis of influence of curvature of the shallow shell elements on the level of their structural vibrations and sound radiation for different kinds of excitation (deterministic: harmonic, polyharmonic; random of white noise type) were discussed. In the presented paper the method based on the acoustic power radiated by the shell was applied to estimate the sound radiated by randomly excited shallow shells with different radii of curvatures. The shell is loaded by the continuous force, distributed over the middle surface, and randomly varying in time. The random, coloured noise type of excitation is assumed. The estimations are valid for the acoustic far-field.