Сравнение на методи
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| Метод на надеждност от втори ред (SORM)× | Метод за надеждност от първи ред (FORM)× | |
|---|---|---|
| Област | Инженерство на надеждността | Инженерство на надеждността |
| Семейство | Process / pipeline | Process / pipeline |
| Година на възникване≠ | 1979 | 1969 |
| Създател≠ | Bernd Fiessler | Allin Cornell |
| Тип | Reliability analysis method | Reliability analysis method |
| 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. DOI ↗ | Cornell, C. A. (1969). A probability-based structural code. Journal of the American Concrete Institute, 66(12), 974-985. DOI ↗ |
| Други названия | SORM, Second-order approximation | FORM, First-order second-moment method |
| 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. | The First-Order Reliability Method (FORM) is a probabilistic technique for estimating the probability of structural failure given uncertain input parameters. Developed by Allin Cornell in 1969 and refined by Hasofer and Lind in 1974, FORM provides a computationally efficient approximation to the true failure probability by linearizing the limit-state function at the most probable failure point. It has become the cornerstone of modern structural reliability analysis and risk-based design. |
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