Title: Modelling of complex structures using superelements

Authors: Anton Ianakiev

Addresses: School of Architecture Design and Built Environment, Nottingham Trent University, Burton Street, Nottingham, NG1 4BU, UK

Abstract: The object of this investigation is a transient analysis of a complex structure. The modelling method using superelements is presented first. The working arm of a hydraulic excavator is then taken as a vehicle to illustrate the method, by employing substructuring (superelements) in a sample working cycle, where a pre-defined potential cutting force taken as a function of time is the major external load. The forces in all the joints of the working arm and the stress distribution in all the sub-structures have been obtained. Using the obtained results recommendations are given for the digging cycle that will produce lower dynamic loads.

Keywords: finite element method; FEM; superelements; transient analysis; dynamic analysis; hydraulic excavators; modelling; complex structures; cutting force; joint forces; stress distribution; digging cycle; dynamic loads.

DOI: 10.1504/IJDE.2008.024789

International Journal of Design Engineering, 2008 Vol.1 No.4, pp.396 - 411

Published online: 30 Apr 2009 *

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