Estimating extreme characteristics of stochastic non-linear systems
نویسندگان
چکیده
The nature of the ocean is random and, as a result, marine structures face extreme, non-linear load effects. Estimating extreme responses said often reduces to purely probabilistic approaches involve considerable amount conjecture. A method developed in this paper conserve original system information without need for high fidelity Monte Carlo Simulations. Here, an iterative linearization estimate extremes system. Matched Upcrossing Equivalent Linear System (MUELS) finds linear systems with zero-upcrossing periods equivalent that under specified forcing spectrum. These are used input into Design Loads Generator, where ensembles realizations at exposure period interest, and time series lead those extremes, generated. valid inputs create set approximate interest. As example, introduces applies Duffing Oscillator various levels increasing cubic stiffness, forced by ITTC wave spectrum, long 108 hours representing O(1010) zero-crossing maxima. Quantitative comparisons made simulations, GEVD estimates, expected values near local
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ژورنال
عنوان ژورنال: Ocean Engineering
سال: 2021
ISSN: ['1873-5258', '0029-8018']
DOI: https://doi.org/10.1016/j.oceaneng.2021.109042