Geometrically Nonlinear Deformation Reconstruction Based on iQS4 Elements Using a Linearized Iterative iFEM Algorithm
作者机构:School of MechanicsCivil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710129China Faculty of Engineering and Natural SciencesSabanci UniversityTuzlaIstanbul 34956Turkey Integrated Manufacturing Technologies Research and Application CenterSabanci UniversityTuzlaIstanbul 34956Turkey
出 版 物:《Acta Mechanica Solida Sinica》 (固体力学学报(英文版))
年 卷 期:2023年第36卷第1期
页 面:166-180页
核心收录:
学科分类:07[理学] 0701[理学-数学] 0801[工学-力学(可授工学、理学学位)] 070101[理学-基础数学]
基 金:supported by the NationalNatural Science Foundation of China(Grant No.11902253) the Fundamental Research Funds for the Central Universities of China.The authors are grateful for this support
主 题:Deformation reconstruction iQS4 element Iterative algorithm Nonlinear iFEM Geometric nonlinearity
摘 要:Structural shape monitoring plays a vital role in the structural health monitoring *** inverse finite element method(iFEM)has been demonstrated to be a practical method of deformation reconstruction owing to its unique *** iFEM formulations have been applied to small deformation of structures based on the small-displacement assumption of linear ***,this assumption may be inapplicable to some structures with large displacements in practical ***,geometric nonlinearity needs to be *** this study,to expand the practical utility of iFEM for large displacement monitoring,we propose a nonlinear iFEM algorithm based on a four-node inverse quadrilateral shell element *** the advantage of an iterative iFEM algorithm,a nonlinear response is linearized to compute the geometrically nonlinear deformation reconstruction,like the basic concept of nonlinear FE *** examples are solved to verify the proposed *** is demonstrated that large displacements can be accurately estimated even if the in-situ sensor data includes different levels of randomly generated *** is proven that the nonlinear iFEM algorithm provides a more accurate displacement response as compared to the linear iFEM methodology for structures undergoing large ***,the proposed approach can be utilized as a viable tool to effectively characterize geometrically nonlinear deformations of structures in real-time applications.