Computational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground

World Multidisciplinary Earth Sciences Symposium 2016

Vlek, Jozef^1 ; Valaková, Veronika^2

Department of Geotechnics, Faculty of Civil Engineering, University of ilina, Univerzitná 8215/1, ilina

010 26, Slovakia^1

Department of Structural Mechanics and Applied Mathematics, University of ilina, Univerzitná 8215/1, ilina

010 26, Slovakia^2

关键词: Analytical approach;    Calculation procedure;    Computational simulation;    Computational ways;    Crucial parameters;    Engineering practices;    Larger deformations;    Subgrade reactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/2/022033/pdf
DOI  :  10.1088/1755-1315/44/2/022033

来源: IOP

【 摘 要 】

The effect of a moving load represents the actual problem which is analysed in engineering practice. The response of the vehicle and its dynamic effect on the pavement can be analysed by experimental or computational ways. The aim of this paper was to perform computer simulations of a vehicle-ground interaction. For this purpose, a half-part model of heavy lorry Tatra 815 and ground was modelled in computational programmes ADINA and PLAXIS based on FEM methods, utilizing analytical approaches. Two procedures were then selected for further calculations. The first one is based on the simplification of the stiffer pavement layers to the beam element supported by the springs simulating the subgrade layers using Winkler-Pasternak theory of elastic half-space. Modulus of subgrade reaction was determined in the standard programme trough the simulation of a plate load test. Second approach considers a multi-layered ground system with layers of different thicknesses and material properties. For comparison of outputs of both approaches, the same input values were used for every calculation procedure. Crucial parameter for the simulations was the velocity of the passing vehicle with regard to the ground response to the impulse of the pass. Lower velocities result in almost static response of the pavement, but higher velocities induce response that can be better described by the dynamic theory. For small deformations, an elastic material model seems to be sufficient to define the ground response to the moving load, but for larger deformations advanced material models for the ground environment would be more reliable.