Abstract
Bolotin's method of integral estimates, Statistical Energy Analysis and the theory of high-frequency vibration are combined in order to predict the vibrations of structural members in complex systems. The concept allows us to consider any driven component separately, where the presence of other structural members and coupling are taken into account by means of a frequency drift and an effective damping factor. The utility of the concept is demonstrated by solving two practical problems: (i) vibration of a solid-propellant engine caused by its vibrating combustion; (ii) vibrations of a thin-walled cover of an engine head. The approach enables one to indicate a frequency domain wherein a localization of vibration within structural members occurs.
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