Abstract
From the point of view of dynamics, structural damage manifests as a decrease of stiffness of the material of structural elements or a decrease of their masses (removal from the system due to destruction). The effect of damage on the behavior of vibration systems consists in redistribution of stiffnesses and masses and manifests as a change in natural frequencies and vibration modes. The survivability of damaged vibration systems is viewed as the sensitivity of their natural frequencies and vibration modes to various types of damage. The survivability analysis technology consists in a multivariate modal analysis of the structure with variation in its damage. The article considers the results of numerical simulation of frequencies and modes of natural vibrations of a high-pressure xenon tank mounted on the hull’s primary structure after various types of damage to the latter. The tank is a part of the electric propulsion engine of a spacecraft. The results allow assessment of the sensitivity of dynamic characteristics of the tank to damage to the primary structure.
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