A 3D implicit structured multi-block grid finite volume method for computational structural dynamics

Ma, L., Barakos, G. N. and Zhao, Q. (2021) A 3D implicit structured multi-block grid finite volume method for computational structural dynamics. Aerospace Science and Technology, 117, 106980. (doi: 10.1016/j.ast.2021.106980)

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Abstract

This work aims to develop a FVM-based structural solver that can seamlessly be integrated with Computational Fluid Dynamics (CFD) solvers for fluid-structure interaction (FSI) problems. For flexibility in gridding and efficient computation, hexahedral multi-block grids are adopted which are locally structured, but globally unstructured. Besides, ghost cells are introduced to solve the partial derivatives and displacements at the boundaries of the computational domain. Time-accurate solutions are obtained by employing a matrix-free, dual time stepping approach, and the implicit residual value smoothing method is used to increase the convergence rate. Stresses are evaluated using Green's theorem based on the gradients of the displacement of the cells. The proposed method is applied to static and dynamic response of 3D cantilevers. Results are found to agree well with analytical solutions, and the amplitude error of the dynamic response is less than 1.5%. Besides, resonance and beating phenomena were clearly observed and compared to Finite Element approaches in accuracy and efficiency. Finally, the dynamic response of a cantilever beam with NACA0012 airfoil is analyzed preliminarily.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George
Authors: Ma, L., Barakos, G. N., and Zhao, Q.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Aerospace Science and Technology
Publisher:Elsevier
ISSN:1270-9638
ISSN (Online):1626-3219
Published Online:22 July 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Aerospace Science and Technology 117: 106980
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302201MENtOR: Methods and Experiments for NOvel RotorcraftGeorge BarakosEngineering and Physical Sciences Research Council (EPSRC)EP/S013814/1ENG - Aerospace Sciences