On the Numerical Identification of System Properties in a Square Frame |
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| Authors: | Georg Zenz Karin Nachbagauer Johannes Gerstmayr Ming-Hsiang Shih Yeong-Bin Yang |
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| Institution: | 1. Linz Center of Mechatronics GmbH (LCM), Altenberger Strasse 69, 4040 Linz, Austria;2. Institute of Technical Mechanics, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria;3. Dep. of Civil Engineering, National Chi-Nan Univ., 1, Univ. Road, Puli, Nantou Hsien, Taiwan, 545 Republic of China;4. Dep. of Civil Engineering, National Taiwan University, 1, Sec.4 Roosevelt Road, Taipei, Taiwan, 10617 Republic of China |
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| Abstract: | 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) |
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