Influence of structural damping on the durability of a crane metal construction

Abstract

The durability of the metal structure of a clamshell crane is predicted in two ways: by the hypothesis of linear summation of damage and using the model of cyclic degradation of the static properties of the material. In the second case, a conservative estimate of longevity is obtained for a quasi-random stress spectrum at the dangerous point of the span beam. A significant influence of structural damping on the service life of the crane has been revealed. Calculations by the developed algorithm are performed on an ordinary personal computer with a small expenditure of computer time. © 2018 Author(s).