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Comprehensive sensitivity analyzing method for rigidity of automobile body

A sensitivity analysis, automobile body technology, applied in the direction of motor vehicles, transportation and packaging, etc., can solve problems such as ineffectiveness and unscientific calculation results, and achieve the effect of avoiding correlation problems between parts

Active Publication Date: 2014-04-02
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

[0004] The present invention designs a comprehensive sensitivity analysis method for automobile body stiffness, which solves the technical problem that the existing automobile body stiffness sensitivity analysis is mainly aimed at individual parts of the automobile, and the simple calculation of the influence of a single part on the stiffness value of the car body exists Relatively large defects, the calculation results are not scientific, and the proposed solutions are not effective

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  • Comprehensive sensitivity analyzing method for rigidity of automobile body
  • Comprehensive sensitivity analyzing method for rigidity of automobile body

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Embodiment Construction

[0018] Combine below figure 1 with figure 2 , the present invention is further described:

[0019] Based on the automobile body, the present invention proposes a method for analyzing the bending stiffness, torsional stiffness, and modal characteristics of the automobile body with respect to the variation sensitivity of parameters such as the geometric dimensions of the body parts and material thickness from a systematic point of view.

[0020] Taking the rear floor beam of a certain car as an example, the traditional sensitivity calculation method is to calculate the influence rate of the parameter changes of the first part 1, the second part 2, and the third part 3 on the body stiffness and modal respectively, but due to the three The components are overlapped with each other and have a strong correlation, so the method of simply studying the influence of a certain component on the stiffness mode of the vehicle body has relatively large defects.

[0021] In order to solve ...

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Abstract

The invention relates to a comprehensive sensitivity analyzing method for rigidity of a vehicle body. The comprehensive sensitivity analyzing method comprises the following steps of: dividing the vehicle body into a plurality of individual system modules, wherein each system module is formed by combining a plurality of parts; carrying out sensitivity analysis on each system module, so as to obtain a contribution rate of parameter variation of each system module on each property of a vehicle body is obtained, and the bent rigidity of the vehicle body is analyzed in view of a system, wherein a mode characteristic is relevant to the sensitivity of the parameter vibration of each system module.

Description

technical field [0001] The invention relates to a comprehensive sensitivity analysis method in the field of automobile manufacturing, in particular to a comprehensive sensitivity analysis method for the stiffness of an automobile body. Background technique [0002] Automobile body stiffness is an important indicator that affects the NVH performance and structural durability of automobiles. High stiffness and lightweight have become the goals pursued by today's automobile design. High stiffness and light weight are contradictory to some extent, and the sensitivity analysis of body stiffness to calculate the contribution rate of body component parameters to body stiffness can effectively solve this contradiction. [0003] In the past, the sensitivity analysis of automobile body stiffness was mainly aimed at a single part of the car. The calculation result was the influence of the thickness change of a single part on the body stiffness----sensitivity, but the structure of the c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D65/00
Inventor 聂传红
Owner CHERY AUTOMOBILE CO LTD
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