Method for calculating movement of vehicle in discrete element model
A discrete element and vehicle technology, applied in the field of vehicle-pavement dynamics engineering calculation, can solve the problems of inability to connect discrete element models, and achieve the effect of being suitable for promotion, moderate calculation and good simulation.
Active Publication Date: 2020-08-28
王开森
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[0005] The purpose of the present invention is to provide a calculation method for vehicles moving in the discrete element model, so as to solve the problem that the existing vehicle model and the road surface discrete element model cannot be connected
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[0027] The present invention will be further elaborated below in conjunction with the examples, and the following examples are only for illustration and do not limit the protection scope of the present invention in any way. Procedures and methods not described in detail in the following examples are conventional methods well known in the art.
[0028] The calculation method of the vehicle moving in the discrete element model of the present invention comprises the following steps:
[0029] 1. Establishment figure 1 The 1 / 4 vehicle model in two degrees of freedom under the standard axle load (BZZ-100) shown. The 1 / 4 vehicle model is a commonly used vehicle model for discrete elements, which has the advantages of fast calculation and good simulation performance. It is assumed that the vehicle only moves vertically (two degrees of freedom) in the discrete element model system.
[0030] 2. Using the road surface roughness f as the vehicle excitation, solve the vehicle displaceme...
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The invention relates to a method for calculating movement of a vehicle in a discrete element model. The method comprises the following steps: establishing a two-degree-of-freedom 1 / 4 vehicle model under a standard axle load; solving the contact load of the vehicle and the road surface; constructing a roadbed and pavement discrete element model; writing a vehicle load callback function, and applying the callback function to the discrete element model; establishing a PUBER contact unit, and applying a callback function value to the PUBER contact unit; providing a calculation method for the movement of the vehicle in the discrete element model, that is, removing the first PUBER contact unit while adding the (M + 1)th PUBER contact unit, so that the M PUBER contact units are maintained on thesurface of the discrete element all the time, and the movement of the load can be realized after circulation in sequence; and calculating mechanical behaviors of all structural layers in the roadbedand the pavement through movement of vehicle loads so as to know that after the road is subjected to the action of the loads, all the structural layers of the pavement can settle to different degrees.The data obtained through the calculation method is high in trueness, good in simulation, moderate in calculated amount and worthy of popularization.
Description
technical field [0001] The invention relates to a vehicle-road surface dynamics engineering calculation method, in particular to a calculation method for a vehicle moving in a discrete element model. Background technique [0002] The common asphalt pavement structure is generally composed of asphalt layer, cement stabilization layer and road base. The asphalt layer is composed of asphalt, coarse aggregate, fine aggregate, mineral powder and admixture; the cement stabilization layer is composed of coarse aggregate , fine aggregate and cement mixture; roadbed is composed of soil or stone. Since the overall pavement structure is a structure of heterogeneous and discontinuous materials, under the action of vehicle loads, the internal stress-strain of the pavement is generally discontinuous. Most of the traditional calculation methods use finite element theory to solve the corresponding macroscopic physical and mechanical characteristics. The finite element theory assumes that ...
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Login to View More IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 王开森戎志博底杰司春朝赵云张晓伟齐军战付立广张磊严战友赵国芳
Owner 王开森