Article (Scientific journals)
Moment-based Hermite model for asymptotically small non-Gaussianity
Denoël, Vincent
2025In Applied Mathematical Modelling, 144, p. 116061
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Keywords :
Gram-Charlier series expansion; Edgeworth expansion; Monotonic region; Wind pressure; Reliability; Fatigue analysis
Abstract :
[en] The third degree Moment-based Hermite model, which expresses a random variable as a cubic transformation of a standard normal variable, offers versatility in engineering applications. While its probability density function is not directly tractable, it is more complex to compute than the Gram-Charlier series, which, despite its simplicity, suffers from limitations such as positivity and unimodality issues, restricting its range of applicability. This paper presents two asymptotic analyses of the cubic Moment-based Hermite model for slight non-Gaussianity (i.e. small skewness and excess coefficients, “small” being understood in the sense of perturbation methods), showing that it asymptotically converges to the fourth cumulant Gram-Charlier model, while offering a slightly broader domain of applicability with minimal additional computational cost. Additionally, the paper derives, mathematically, a non empirical expression for the monotone limit of the original cubic translation model, and validates the theoretical findings through numerical simulations.
Disciplines :
Civil engineering
Author, co-author :
Denoël, Vincent  ;  Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil
Language :
English
Title :
Moment-based Hermite model for asymptotically small non-Gaussianity
Publication date :
August 2025
Journal title :
Applied Mathematical Modelling
ISSN :
0307-904X
eISSN :
1872-8480
Publisher :
Elsevier
Volume :
144
Pages :
116061
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
SU - Stanford University
Funding text :
UPS visiting professor grant (Stanford University)
Available on ORBi :
since 12 March 2025

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