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Author:

Zhao, Zhao (Zhao, Zhao.) | Lu, Zhao-Hui (Lu, Zhao-Hui.) | Zhang, Xuan-Yi (Zhang, Xuan-Yi.) | Zhao, Yan-Gang (Zhao, Yan-Gang.)

Indexed by:

Scopus SCIE

Abstract:

Reasonable simulation of stochastic fields is a key prerequisite for addressing stochastic mechanics problems with Monte Carlo simulation solver. This paper presents a novel method to simulate m-variate and n-dimensional (mV-nD) homogenous non-Gaussian fields according to the prescribed power spectral density matrix (PSDM) and first four moments. In the proposed method, the unified Hermite polynomial model (UHPM) is first extended to mV-nD homogenous non-Gaussian fields. Then, based on the extended UHPM, a complete transformation model from the normalized non-Gaussian correlation function matrix (CFM) into the underlying Gaussian CFM with its applicable range is derived. In addition, two types of potential incompatibility of the transformation arising from the prescribed PSDM and first four moments are defined and neatly solved. Finally, a unified simulation framework for mV-nD homogenous non-Gaussian fields is presented, where the fast Fourier transform technique can be embedded in both spectral representation method and Wiener-Khintchine transformation to speed up the simulation progress. Two numerical examples including the simulations of non-Gaussian wind fields and non-Gaussian fields of material properties are presented to demonstrate the effectiveness of the proposed method.

Keyword:

Incompatibility Unified Hermite polynomial model (UHPM) Spectral representation method Author key Simulation of m-variate and n-dimensional (mV-nD) homogenous non-Gaussian field

Author Community:

  • [ 1 ] [Zhao, Zhao]Natl Univ Singapore, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 117576, Singapore
  • [ 2 ] [Lu, Zhao-Hui]Beijing Univ Technol, Key Lab Urban Secur Disaster Engn Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Xuan-Yi]Beijing Univ Technol, Key Lab Urban Secur Disaster Engn Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 4 ] [Zhao, Yan-Gang]Beijing Univ Technol, Key Lab Urban Secur Disaster Engn Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China

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Source :

JOURNAL OF ENGINEERING MECHANICS

ISSN: 0733-9399

Year: 2023

Issue: 7

Volume: 149

3 . 3 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:19

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 15

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