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Title:
NEAR-FIELD FINITE ELEMENT METHOD FOR STRUCTURAL DAMAGE ANALYSIS, AND IMPLEMENTATION METHOD THEREFOR IN COMMERCIAL SOFTWARE
Document Type and Number:
WIPO Patent Application WO/2023/011029
Kind Code:
A1
Abstract:
The present invention relates to a near-field finite element method for structural damage analysis, and an implementation method therefor in commercial software. The near-field finite element method for structural damage analysis comprises the steps of: (A1) obtaining a finite unit from a target structure; (A2) generating a near-field unit on the basis of the finite unit; (A3) calculating an overall load vector; (A4) calculating an overall stiffness matrix; (A5) solving an overall node displacement; (A6) determining whether the current calculation result converges, if so, proceeding to (A7), otherwise, returning to (A4); (A7) determining whether the current applied load exceeds a preset value, if so, proceeding to (A8), otherwise, increasing the load and then returning to (A3); and (A8) outputting a result. The implementation method comprises the operations of: (B1) generating a near-field unit on the basis of a finite unit, and inputting same into software; (B2) compiling the formula of the unit stiffness matrix in (A4) into a unit development subprogram of the software; and (B3) setting an update mode of the function μ(ξ, t) in (A6). The method in the present invention has a concise calculation process and has good compatibility with commercial software.

Inventors:
HAN FEI (CN)
LI ZHIBIN (CN)
Application Number:
PCT/CN2022/100311
Publication Date:
February 09, 2023
Filing Date:
June 22, 2022
Export Citation:
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Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G06F30/23
Foreign References:
CN113705040A2021-11-26
CN110457790A2019-11-15
CN111814310A2020-10-23
CN111339594A2020-06-26
Other References:
SHEN SHANGKUN, YANG ZIHAO, HAN FEI, CUI JUNZHI, ZHANG JIEQIONG: "Peridynamic modeling with energy-based surface correction for fracture simulation of random porous materials", THEORETICAL AND APPLIED FRACTURE MECHANICS, ELSEVIER BV, NL, vol. 114, 1 August 2021 (2021-08-01), NL , pages 102987, XP093031372, ISSN: 0167-8442, DOI: 10.1016/j.tafmec.2021.102987
HAN FEI; LUBINEAU GILLES; AZDOUD YAN; ASKARI ABE: "A morphing approach to couple state-based peridynamics with classical continuum mechanics", COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, NORTH-HOLLAND, AMSTERDAM, NL, vol. 301, 4 January 2016 (2016-01-04), AMSTERDAM, NL , pages 336 - 358, XP029411294, ISSN: 0045-7825, DOI: 10.1016/j.cma.2015.12.024
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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