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Date of Publication:2020-01-01

Journal:Chinese Journal of Computational Mechanics

Volume:37

Issue:5

Page Number:535-544

ISSN No.:1007-4708

Key Words:"segment joint; equivalent flexural rigidity; surrogate model; longitudinal dislocation; 3Dcontact finite element"

CN No.:21-1373/O3

Abstract:Regarding the insufficient consideration of on overall equivalency between the 3D-model and equivalent beam-spring model for the segment joint of a shield funnelling machine,a new method is proposed to evaluate the equivalent flexural rigidity by solving a deflection equivalence based inverse problem,in which the result of 3Dcontact FE simulation is taken as an alternative of experiment.A Kriging surrogate model is constructed to describe the nonlinear relationship between the equivalent flexural rigidity and internal force,and is employed to develop a numerical algorithm for the structural analysis of the segment-joint with nonlinear joint flexural rigidity.In comparison with 3DFE simulation, the proposed method can effectively predict the internal force and deformation in the view on a whole.In addition,a deeper investigation is given to the impacts of the bolt hole clearance and liner constitutive model on the longitudinal dislocation of the segment joint via the 3Dcontact FE simulation.

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