fatigue life, frequency methods, damping coefficient, power spectral density
Abstract
Mechanical engineering products are often subjected to dynamic impact during operation. The analysis of the durability of structures functioning under random multi-frequency loading requires taking into account their dynamic parameters (natural frequencies and vibration forms, damping, etc.). This paper analyzes the influence of the damping coefficient on the durability of a structurally similar specimen using a method for the narrow-band process and the Dirlik method. A computational scheme based on a finite element model determines the stress spectral density. The study defines the range of the damping coefficient variation by experiment and calculates the durability of the damping coefficient. The influence of damping on durability is analyzed by different methods. The calculations are experimentally verified.
Author Biographies
Kirill Antonovich Khoroshevskii, South Ural State University, Chelyabinsk
Post-graduate Student
Aleksey Viktorovich Erpalov, South Ural State University, Chelyabinsk
Cand. Sc. (Engineering), Senior Staff Scientist
Irina Victorovna Gadolina, Mechanical Engineering Research Institute of the Russian Academy of Sciences, Moscow
