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On the Numerical Identification of System Properties in a Square Frame
Author(s) -
Zenz Georg,
Nachbagauer Karin,
Gerstmayr Johannes,
Shih MingHsiang,
Yang YeongBin
Publication year - 2013
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201310041
Subject(s) - square (algebra) , nonlinear system , frame (networking) , finite element method , beam (structure) , identification (biology) , set (abstract data type) , system identification , structural engineering , computer simulation , computer science , mathematics , engineering , physics , geometry , simulation , measure (data warehouse) , botany , quantum mechanics , database , biology , programming language , telecommunications
In this paper the influencing factors of the nonlinear behavior of a highly deformable square frame are aimed to highlight and identify. Therefore, in a first step a square frame consisting of four slender members of equal length has been investigated experimentally. Subsequently to these investigations, a numerical model is set up with a beam finite element model, which is based on the absolute nodal coordinate formulation (ANCF), including geometrical and possible material nonlinearities. The influencing factors as well as the system properties are identified by using a genetic optimization algorithm. The final results show that the highly nonlinear behavior of the square frame can be reproduced accurately in case the nonlinear characteristics of the joints are taken into account carefully. The numerical model combined with the system parameter identification can be utilized for further numerical investigations of non‐standard structures undergoing large deformations. (© 2013 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)