Multiaxis Rainflow Fatigue Methods for Nonstationary Vibration

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Irvine, T.^1

Dynamic Concepts, Inc., Huntsville

AL, United States^1

关键词: Cumulative damage calculation;    Cyclical loading;    Damage calculations;    Hybrid techniques;    Mechanical structures;    Non-stationary vibration;    Rainflow cycle counting;    Random vibrations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012171/pdf
DOI  :  10.1088/1742-6596/744/1/012171

来源: IOP

【 摘 要 】

Mechanical structures and components may be subjected to cyclical loading conditions, including sine and random vibration. Such systems must be designed and tested according. Rainflow cycle counting is the standard method for reducing a stress time history to a table of amplitude-cycle pairings prior to the Palmgren-Miner cumulative damage calculation. The damage calculation is straightforward for sinusoidal stress but very complicated for random stress, particularly for nonstationary vibration. This paper evaluates candidate methods and makes a recommendation for further study of a hybrid technique.