Automobile collision accident reappear method based on car body key point three-dimension distorsion

A collision accident, three-dimensional deformation technology, applied in special data processing applications, measuring devices, instruments, etc., to achieve the effect of objectivity

Inactive Publication Date: 2006-01-25
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Make it solve the recurrence analysis of traffic accidents when there are no brake marks or the brake marks are not clear

Method used

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  • Automobile collision accident reappear method based on car body key point three-dimension distorsion
  • Automobile collision accident reappear method based on car body key point three-dimension distorsion
  • Automobile collision accident reappear method based on car body key point three-dimension distorsion

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Embodiment Construction

[0028] According to the characteristics of the collision accident (frontal collision, side collision, etc.) and the difference of collision objects (vehicle-vehicle, vehicle-person, vehicle-fixed object, etc.), the present invention selects the key point of vehicle body deformation measurement, and provides the accident evaluation index: x 1 , x 2 ,...,x n . These evaluation indicators reflect the deformation of key points in the main energy-absorbing components during the collision process. Taking frontal collision and oblique collision as examples, the bolt holes and positioning holes on the front longitudinal beam and fender at the front of the vehicle body are selected as key points for measurement.

[0029] According to the investigation and measurement of the accident scene, the three-coordinate measurement values ​​of these key points can be obtained: x 1e , x 2e ,...,x ne .

[0030] The numerical simulation value of the corresponding point can be obtained through...

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Abstract

The invention relates to reappear three dimensional deformation of a vehicle body in a collision accident, including the steps: building an accident occurrence environment and finite element models for the related vehicles in the accident; verifying the reliability of the finite element models; selecting vehicle body key points adaptive to head-on collision and oblique collision and processing the holes in a numeric model; using three-coordinate measurer to physically measure the fixed key point positions; to a finite element model for the whole vehicle, adopting key point deforming measuring method; by multiple iterative optimization calculation, if finding the numeric simulated result of the deformed key points is consistent with the actual collision measured result at a certain speed and collision angle, determining the accurate automobile speed and collision angle at the occurring time of the accident. The invention can recover the accident on the condition that the trace of the wheels and other field information are destroyed or not clear, and has better objectivity because of making three-dimensional measurement on the measured points of the main energy absorbing components.

Description

technical field [0001] The invention relates to an accident reproduction method used in the traffic field, in particular to an automobile collision accident reproduction method based on three-dimensional deformation of key points of a vehicle body. Background technique [0002] In order to reproduce the analysis of automobile collision accidents, usually from multiple angles such as energy and momentum, according to the characteristic parameters of the collision stage (such as vehicle deformation characteristics, rebound coefficient, contact surface friction coefficient, collision center, etc.) Image, using lumped parameter model method and multi-rigid body system dynamics method for accident analysis, currently the commonly used accident analysis methods in the world include momentum / energy analysis method and deformation / energy analysis method. In addition, throwing distance analysis methods, geometric and time analysis methods, and centrifugal force analysis methods are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01P3/00G06F17/00
Inventor 金先龙张晓云李渊印李治曹源
Owner SHANGHAI JIAO TONG UNIV
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