Structural contact-collision behavior analysis based on bar system discrete element method

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (13) : 103-110.

XU Qiang1,2, YE Jihong1,2

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Abstract

This paper presents the structural connect-impact analysis using the member discrete element method(MDEM), and the collision response between the members is simulated by correcting the particle motion trajectory. Firstly, a point-line contact model is established based on the possible contact modes between the members, and then the concept of virtual contact point pairs is introduced into the critical contact constraint conditions, also, the formulations of the contact force are deduced in detail. The program based on the MDEM is also develop by Fortran Language to analyze structural contact-impact behaviors. The correctness and effectiveness of the algorithm are quantitatively verified through the simulation and analysis of typical numerical examples. The results show that the point-line contact model can make timely judgments on contact-impact between members and accurately calculate the normal repulsive force and tangential friction force, meanwhile, there is energy dissipation in the process of contact-impact.

Key words

member discrete element method / particle / contact-impact / contact model / impact force

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XU Qiang1,2, YE Jihong1,2. Structural contact-collision behavior analysis based on bar system discrete element method[J]. Journal of Vibration and Shock, 2023, 42(13): 103-110

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