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Structural Engineering and Mechanics Volume 53, Number 2, January25 2015 , pages 373-392 DOI: https://doi.org/10.12989/sem.2015.53.2.373 |
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Structural joint modeling and identification: numerical and experimental investigation |
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Sanjay B. Ingole, Animesh Chatterjee
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| Abstract | ||
| In the present work, structural joints have been modeled as a pair of translational and rotational springs and frequency equation of the overall system has been developed using sub-structure synthesis. It is shown that using first few natural frequencies of the system, one can obtain a set of over-determined system of equations involving the unknown stiffness parameters. Method of multi-linear regression is then applied to obtain the best estimate of the unknown stiffness parameters. The estimation procedure has been developed first for a two parameter joint model and then for a three parameter model, in which cross coupling terms are also included. Two cases of structural connections have been considered, first with a cantilever beam with support flexibility and then a pair of beams connected through lap joint. The validity of the proposed method is demonstrated through numerical simulation and by experimentation. | ||
| Key Words | ||
| vibration; sub-structure synthesis; joint stiffness identification; linear parameters; multi-linear regression; cantilever; single lap joint | ||
| Address | ||
| Sanjay B. Ingole: Government Polytechnic, Nagpur, 440 001, India Animesh Chatterjee: Visvesvaraya National Institute of Technology, Nagpur 440 010, India | ||