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A method of modeling water horses using sph technology in car collisions

A kind of water horse and technical technology, applied in the field of automobile collision modeling, can solve the problems of unknown calculation amount, huge description space, too large, etc., to achieve the effect of improving authenticity, reducing calculation time, and ensuring calculation accuracy

Active Publication Date: 2019-12-24
DALIAN ROILAND SCI & TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

For the simulation of water, if the Euler space is used to describe, whether the Euler method or the ALE method is used, the description space is huge and unknown, and the calculation amount is too large.

Method used

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  • A method of modeling water horses using sph technology in car collisions
  • A method of modeling water horses using sph technology in car collisions
  • A method of modeling water horses using sph technology in car collisions

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Embodiment 1

[0031] This application is mainly aimed at one of the hit objects in the CAE vehicle collision simulation: the porous water horse. The medium in the cavity (usually water) shakes violently after being hit and even overflows when the water horse is damaged. The invention adopts the SPH technology, and forms and perfects the particle generation rule and the contact rule between the particle and the finite element model in a targeted manner, gradually establishes the enterprise standard, and improves the accuracy of the characteristic value data such as the acceleration response of the vehicle body after the collision of the vehicle, Improved the reliability of components in damage assessment. In the prior art, whether Euler method or ALE method is used, there are problems of huge and unknown description space and excessive calculation, and SPH shows certain advantages in this problem. As a Lagrangian particle, the motion of matter be fully described. As a kind of mesh-free tech...

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Abstract

The invention discloses a method for finishing road barrier modeling by adopting an SPH technology in car collision. The method comprises the steps of performing discretization on a road barrier by adopting a three-dimensional shell unit, and endowing the road barrier with a high molecular fragile material capable of becoming invalid; filling space of an inner cavity with a water medium by adopting particles arranged at equal intervals, wherein the inner cavity of the road barrier is an irregular body, so that initial smooth lengths of the particles need to be kept consistent as far as possible during generation for preventing stall of subsequent individual particles; enabling the particles to be in point-surface contact with the shell unit, and performing a certain parameter adjustment according to a particle gap for keeping the stability of contact; and introducing a car finite element model after finishing a road barrier individual, and performing complete car collision analysis. Therefore, the analysis precision can be improved and a truer collision result can be given.

Description

technical field [0001] The invention belongs to the field of automobile collision modeling, in particular to a method for completing water horse modeling by using SPH technology in automobile collision. Background technique [0002] The application of CAE technology in the automotive industry has been gradually improved. From the design of auto parts to the performance analysis of the whole vehicle; from the rigidity of the car structure to the analysis of the internal and external flow field; a great guiding role. Especially in the field of automobile collision, CAE analysis has formed a series of mature NCAP and other specifications, which provide detailed analysis guidance in vehicle collision events. However, at the present stage, in the CAE simulation of vehicle collision events, FEM is the main method. Although FEM has the advantages of high efficiency, stability, and high accuracy, it also has some unavoidable defects, such as high grid dependence. [0003] Porous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 田雨农王冬
Owner DALIAN ROILAND SCI & TECH CO LTD
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