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Discrete element and finite element mixed road surface sample model based gravel road replacement method

A technology of mixing samples and gravel pavement, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problem that discrete unit scale simulation analysis cannot be realized, and achieve the effect of improving calculation accuracy and efficiency.

Inactive Publication Date: 2016-08-17
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, modeling all test intervals of off-road vehicle driving performance on sand will lead to a huge number of discrete unit scales, making simulation analysis impossible

Method used

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  • Discrete element and finite element mixed road surface sample model based gravel road replacement method
  • Discrete element and finite element mixed road surface sample model based gravel road replacement method
  • Discrete element and finite element mixed road surface sample model based gravel road replacement method

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Embodiment Construction

[0052] The purpose of the present invention will be further described in detail through specific examples below, and the examples cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following examples.

[0053] The implementation device structure schematic diagram of the present invention is as figure 1 As shown, including central processing unit, input device, output device, internal memory device and external memory device. Wherein, the central processing unit (CPU) is used for calculating and processing data such as reading in, analyzing, and updating, and is a key part of implementing the present invention; input devices such as mouse, keyboard, etc., are used to input data and the initial model of program calculation ; The output device is used to display the calculated analysis result data and information in the form of charts and characters. Commonly used output devices such as monitors, printers, etc.; in...

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Abstract

A discrete element and finite element mixed road surface sample model based gravel road replacement method mainly includes: adopting a discrete unit for describing a gravel road surface in a ground contact area of a tire and a neighboring area of the ground contact area of the tire to obtain a discrete element sample road surface; adopting a finite unit for describing a gravel road surface which is close to the ground contact area of the tire and in possibly potential evident deformation but avoids damages to obtain a finite element sample road surface; adopting the discrete element sample road surface and the finite element sample road surface to generate a mixed sample road surface; storing information of the mixed sample road surface into an internal memory of a computer; doubly duplicating the mixed sample road surface to sequentially form an initial road surface for wheels to run on; when a running distance of the wheels is equal to a mixed road surface sample length, deleting a first road surface sample block while paving a same mixed sample road surface in a wheel running direction. The method has the advantages that calculation efficiency can be remarkably improved on the premise of guarantee of precision and is significant to researches on trafficability of sport utility vehicles running on large-scale gravel roads.

Description

technical field [0001] The present invention is a road replacement analysis method based on the discrete element and finite element coupling method for evaluating the driving performance of vehicles on sandy gravel roads, specifically a discrete element and finite element mixed road surface sample for analyzing the driving performance of a single wheel or a complete vehicle on sandy gravel roads Model Pavement Replacement Method. Background technique [0002] The work of off-road vehicles on muddy roads, the working status of planetary exploration vehicles on the surface of planets (Mars, the moon, etc.), agricultural production and engineering construction operations of agricultural machinery and engineering machinery, mostly involve vehicle wheels on soft sandy roads. the behavior of. The complex mechanical response (large displacement, self-slip, etc.) shown by the sand and gravel after the tire action will have a great impact on the wheels and the whole vehicle, such as...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 臧孟炎曾海洋郑祖美
Owner SOUTH CHINA UNIV OF TECH
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