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Multi-target reliability optimization technique for direct impact safety of automobile

A multi-objective optimization and safety technology, applied in the field of multi-objective optimization technology, can solve problems such as uncertainty and fluctuations in vehicle collision safety performance

Inactive Publication Date: 2013-02-27
HUNAN UNIV
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  • Abstract
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Problems solved by technology

[0005] The present invention takes into account the existence of uncertain factors in automobile manufacturing, such as the uncertainty of material parameters, the uncertainty of structural geometric dimensions, etc., in order to solve the problem of fluctuations in the safety performance of automobile collision caused by uncertain factors, a method is proposed here A Multi-objective Optimization Method Based on Ellipsoid Convex Model

Method used

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  • Multi-target reliability optimization technique for direct impact safety of automobile
  • Multi-target reliability optimization technique for direct impact safety of automobile
  • Multi-target reliability optimization technique for direct impact safety of automobile

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Embodiment Construction

[0051] Attached below Figure 1-4 The present invention is described in further detail by examples.

[0052]figure 1 is a simplified model of car frontal collision, car 3 is set on ground 2, and car 3 is running at a speed of 56km / h ( figure 1 The direction indicated by the arrow 4 in the middle) crashes into the rigid barrier 1.

[0053] figure 2 It is a simplified model of the main energy-absorbing parts of the frontal collision of the car. The front bumper cover of the car 3 is provided with anti-collision steel beams 5, and the two ends of the anti-collision steel beams 5 are provided with symmetrical front longitudinal beams 6 and front longitudinal beams in a direction perpendicular to them. A reinforcing plate 8 is arranged between the beam cover plate 7 and the front longitudinal beam 6 and the front longitudinal beam cover plate 7 .

[0054] image 3 It is a calculation step of judging the collision safety of automobile body based on multi-objective optimization....

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Abstract

The invention discloses a multi-target reliability optimization technique for direct impact safety of an automobile. According to the multi-target reliability optimization technique, uncertainty of parameters of physical dimension and materials of automobile parts is considered, uncertain parameters are described by using an ellipsoid convex model, and a constraint function in a multi-target model is processed by means of a reliability index calculation method based on a volume ratio; and simultaneously, an approximation model is established on the basis of a response surface method. By means of the multi-target optimization technique, the influence of the uncertain parameters of a structure on safety during automobile crash is analyzed, and riding safety of passengers is improved.

Description

technical field [0001] The invention belongs to the field of automobile safety and relates to a multi-objective optimization technology for evaluating automobile collision safety. Background technique [0002] Most of the multi-objective optimization techniques currently applied to vehicle collisions are aimed at deterministic problems. However, in the actual production process, the machining accuracy of the machine tool will cause the thickness of the material to fluctuate within a certain range around the given value; the parameters such as the density and elastic modulus of the material will fluctuate to a certain extent due to the later aging treatment. The uncertainty of these parameters will produce certain fluctuations in the safety of automobile crashes, and there is a risk of failure, so it is necessary to study them to achieve the purpose of reducing the injury of occupants. [0003] At present, all published patents on automobile safety include: 201010278653.8 Mu...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 姜潮钟云锋韩旭
Owner HUNAN UNIV
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