Dynamic response of mortar base plate-soil model under strong impact load based on modified D-P criterion

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (5) : 214-220.

WANG Fengfeng, YANG Guolai, GE Jianli

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Abstract

At present, the soil calculation model selected when calculating the mortar base plate model in Abaqus is the D-P (Drucker-Prager) model that comes with the software, which has a certain gap with the actual situation. In order to improve the calculation accuracy of a mortar base plate-soil coupling model, this paper establishes a base-soil coupling finite element simulation model, and applies a modified D-P model to the soil yield in the mortar base plate-soil coupling calculation The criterion, the criterion introduces a corner model, considering the modification of the tensile-shear yield curve. In addition, in order to verify the application effect, the mortar base plate-soil dynamic characteristics test under strong impact load was designed and carried out and the dynamic response values of the plates and the measuring points in the soil were obtained. Numerical calculations and experimental test results show that the modified D-P yield criterion can better describe the experimental phenomenon, which can improve the calculation accuracy of the mortar base plate-soil coupling model and provided reference for the design of the base plate.

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mortar base plate / strong impact load / D-P criterion / finite element / dynamic response

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WANG Fengfeng, YANG Guolai, GE Jianli. Dynamic response of mortar base plate-soil model under strong impact load based on modified D-P criterion[J]. Journal of Vibration and Shock, 2022, 41(5): 214-220

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