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A numerical simulation method of a vehicle load based on a finite element-infinite element model

A technology of vehicle load and numerical simulation, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of high hardware requirements, large amount of calculation, and high efficiency of display algorithms, so as to improve the operation efficiency and absorption effect Effect

Pending Publication Date: 2018-12-18
TONGJI UNIV
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Problems solved by technology

Among them, when the multi-step analysis method is used to simulate acceleration, deceleration or moving loads with complex shapes, the control of the load action time is relatively cumbersome, and the setting of too many analysis steps also makes the addition of moving loads very clumsy; When calculating the finite element model with a large number of grids, the calculation amount is large and the hardware requirements are high; the display algorithm has high efficiency but it is often difficult to apply horizontal friction loads

Method used

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Embodiment

[0039] This embodiment takes a homogeneous soil body with a traffic vehicle load moving speed of 40 m / s and a subgrade length of 12 m as an example to illustrate the applicability and specific calculation and analysis steps of the method of the present invention.

[0040] like figure 1 Shown, the present invention relates to a kind of vehicle load numerical simulation method based on finite element-infinite element model, and this method comprises the following steps:

[0041] Step 1: Use ABAQUS to establish the foundation soil calculation model;

[0042] According to the length and symmetry of the subgrade to be studied, such as figure 2 As shown, the calculation model of a quarter elongated hemispherical foundation soil is established by using the ABAQUS finite element numerical analysis software. The specific dimensions of the model are as follows: image 3 shown. Among them, h is the thickness of the pavement, H1 is the thickness of the foundation soil, and H2 is the ...

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Abstract

The invention relates to a numerical simulation method of a vehicle load based on a finite element-infinite element model. Firstly, according to the basic physical parameters of soil, the finite element method is established based on ABAQUS. Infinite element soil model; Secondly, according to the speed, amplitude and shape of the moving load, the subprogram is written to define the form of the load. With the help of the body force subprogram interface in ABAQUS Explicit, the Vdload subprogram is accessed, and the physical force is used in the subprogram. The thin layer loading method applies moving vertical load and moving horizontal friction load. Finally, the numerical simulation of vertical and horizontal moving loads acting on the foundation soil is carried out. Compared with the priorart, the invention has the advantages of improving the absorbing effect of the boundary stress wave, solving the problem that the Vdload is difficult to apply the horizontal friction load and the like.

Description

technical field [0001] The invention relates to the field of traffic vehicle dynamic characteristic design, in particular to a vehicle load numerical simulation method based on a finite element-infinite element model. Background technique [0002] In recent years, with the sustained and rapid growth of my country's economy, infrastructure construction has developed rapidly. Infrastructures such as railways, highways, and airports play a vital role in maintaining the normal operation of my country's economic system, and ensuring the safe and stable operation of transportation infrastructure plays an important role in ensuring the healthy development of my country's national economy. [0003] With the rapid development of infrastructure such as highways, railways and airports, the geotechnical engineering problems caused by traffic loads have attracted more and more attention from engineers. Deep soft clay is widely distributed in the plains, coastal areas and some inland are...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23Y02T90/00
Inventor 钱建固吕智戴浴晨高乾
Owner TONGJI UNIV
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