Сравнение на методи

	Метод на надеждност от втори ред (SORM)	Преброяване по метода на „дъждовния поток“ (Rainflow Counting)
Област	Инженерство на надеждността	Инженерство на надеждността
Семейство	Process / pipeline	Process / pipeline
Година на възникване	1979	1974
Създател	Bernd Fiessler	Tatsuo Endo
Тип	Reliability analysis method	Cycle counting algorithm
Основополагащ източник	Fiessler, B., Neumann, H. J., & Rackwitz, R. (1979). Quadratic limit states in structural reliability. Journal of the Engineering Mechanics Division, 105(4), 661-676.	Goodman, J. (1899). Mechanics Applied to Engineering. Longman, Green and Co.
Други названия	SORM, Second-order approximation	Rainflow cycle counting, RFC
Свързани	4	4
Резюме	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.