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| Metoda Drugiego Rzędu (SORM)× | Zliczanie cykli Rainflow× | |
|---|---|---|
| Dziedzina | Inżynieria niezawodności | Inżynieria niezawodności |
| Rodzina | Process / pipeline | Process / pipeline |
| Rok powstania≠ | 1979 | 1974 |
| Twórca≠ | Bernd Fiessler | Tatsuo Endo |
| Typ≠ | Reliability analysis method | Cycle counting algorithm |
| Źródło pierwotne≠ | Fiessler, B., Neumann, H. J., & Rackwitz, R. (1979). Quadratic limit states in structural reliability. Journal of the Engineering Mechanics Division, 105(4), 661-676. DOI ↗ | Goodman, J. (1899). Mechanics Applied to Engineering. Longman, Green and Co. link ↗ |
| Inne nazwy | SORM, Second-order approximation | Rainflow cycle counting, RFC |
| Pokrewne | 4 | 4 |
| Podsumowanie≠ | The Second-Order Reliability Method (SORM) is an extension of FORM that improves failure probability estimates by accounting for the curvature of the limit-state surface at the design point. Introduced by Fiessler, Neumann, and Rackwitz in 1979, SORM provides more accurate approximations for nonlinear failure surfaces while remaining computationally efficient. It has become the standard refinement when FORM accuracy is insufficient. | Rainflow counting is a fatigue cycle counting method that converts a complex stress history into individual cycles for damage assessment. Developed by Tatsuo Endo and colleagues in 1974, it provides the most physically realistic representation of fatigue damage when combined with Miner's linear cumulative damage hypothesis. The algorithm has become the industry standard in reliability engineering and vibration analysis. |
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