Discrete element pavement replacement method for analyzing driving performance of wheel on sand and stone pavement

Abstract

The invention provides a discrete element pavement replacement method for analyzing the driving performance of a wheel on a sandstone pavement. The method comprises the steps of generating a discrete element set within a given space range, enabling the discrete element set to reach a stable state under the dead weight effect of the discrete element set, then backuping the discrete element set which is of a pavement sample block; copying the well backuped pavement sample block for two, forming an initial pavement in front and rear sequence and keeping the length of the initial pavement to be 2 times that of the pavement sample block; enabling the initial position of the wheel to be in the middle of the pavement sample block, and enabling the wheel to drive to a second pavement sample block from the first pavement sample block, when the driving distance of the wheel equals to the length of the pavement sample block, deleting the first pavement sample block, and meanwhile paving the same pavement sample block in front of the wheel driving direction. According to the discrete element pavement replacement method, discrete element simulation to sandstone pavement in the wheel driving performance analysis can be achieved, and the model scale is always kept within 2N discrete elements. Therefore, the discrete element analysis is enabled to have an engineering application value.

Description

technical field [0001] The invention relates to a discrete element analysis method for a large-scale gravel pavement, in particular to a discrete element pavement replacement method for analyzing the running performance of a wheel on a gravel pavement. Background technique [0002] Exploitation of abundant resources in the desert, exploration of unknown fields such as the moon and Mars, military operations under complex terrain, increasingly urgent sandstorm control and inefficient agricultural production all involve the interaction between wheels and loose road surfaces. The gravel pavement is a typical loose pavement. The non-continuous characteristics of the sand and gravel particles, their own rotation and large displacement movement will lead to pavement damage, which will have a great impact on the driving performance of the wheels. Therefore, it is of great significance to study the interaction principle between the wheel and the soft sand and gravel road in depth, to...

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Problems solved by technology

However, when it obtains the force between discrete units, its efficiency decreases sharply as the number of units increases.

[0005] However, in practical engineering problems, when testing the driving performance of wheels on sandy roads, it is usually necessary to travel a long distance. If the sandstone particles within this length range are modeled one by one using discrete units, the analysis time is too long and the simulation analysis is also lost. Practical engineering significance

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