השוואת שיטות

	עדכון וכיול מודל אלמנטים סופיים	שיטת האמינות מסדר ראשון (FORM)
תחום	הנדסת אמינות	הנדסת אמינות
משפחה	Process / pipeline	Process / pipeline
שנת המקור	2001	1969
הוגה השיטה	John Mottershead and Michael Friswell	Allin Cornell
סוג	System identification methodology	Reliability analysis method
מקור מכונן	Mottershead, J. E., Link, M., & Friswell, M. I. (2011). The sensitivity method in finite element model updating: A tutorial. Mechanical Systems and Signal Processing, 25(7), 2275-2296.	Cornell, C. A. (1969). A probability-based structural code. Journal of the American Concrete Institute, 66(12), 974-985.
כינויים	Model updating, Model calibration, FEM updating	FORM, First-order second-moment method
קשורות	4	4
תקציר	Finite Element Model (FEM) Updating is the process of refining a numerical structural model to match measured behavior (modal properties, vibrations, static displacements) from the physical structure. By comparing computational predictions to experimental data and systematically adjusting uncertain model parameters (material properties, boundary conditions, joint stiffness), engineers create more accurate models for design decisions, damage detection, and life prediction. Formalized by Mottershead and Friswell, FEM updating bridges the gap between idealized computer models and real-world structures.	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.