Multi-scaled simulation of latticed frames considering bending collapse of pipes |
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Authors: | LIU Hai-feng LOU Rong LUO Yao-zhi and DANG Hui-xue |
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Institution: | [1]China Electn'city Power Research Institute, Beijing 100055, P. R. China [2]Huahui Engineering Design Group Co. Ltd., Shaoxing 312000, P. R.. China [3]Zhejiang University, Hangzhou 100055, P. R. China |
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Abstract: | To consider the bending collapse of the pipes in the latticed frames, based on the multi-scale simulation, the collapsed parts of the pipe are meshed by the shell elements as micro-scaled models, and the other parts are meshed by beam elements macro-models. The incremental displacement constraint equations for the nodes on the section between the two models are established based on the plane section premise of classical beam theory. The method to introduce the constraint equations is derived based on the Updated Largrangian method. The location of the micro-model is predicted by the stress field of the beam element, and the length of the collapsed part is adjusted by the plastic energy in the micro model. Several examples are included to illustrate the efficiency and accuracy of this method. |
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Keywords: | multi-scaled simulation latticed frames bending collapse plane section premise |
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