Methods of formalized representation and analysis of passenger car body parameters
DOI:
https://doi.org/10.31359/2311.441X.2026.28.38Keywords:
durability, design stress, car body, experimental research, regression analysis, parametric optimization, graphoanalytical interpretationAbstract
Annotation. The object of the study is the normalization of parameters and indicators of automobile bodies and their components at the design stage using experimental and calculated data.
The purpose of the study is to develop a methodology for formalized representation, systematization and analysis of the results of experimental and numerical-analytical studies in order to ensure the optimal choice of design solutions and increase the durability of the passenger car body.
The subject of the study is the quantitative dependence between the design stress, operational life and design parameters of the body, including stiffness, natural frequency, reflection amplitude of characteristic points and technological indicators of the quality of welded joints.
Special attention is paid to establishing statistically substantiated dependencies between design parameters and durability, which allows assessing the influence of individual factors on the service life of body elements.
The study is based on a comprehensive analysis of serial cars and the results of experimental bench tests of bodies after welding, which include an assessment of the dynamic response, registration of the appearance of fatigue cracks and determination of technological characteristics of welds. For data processing, regression analysis methods, parametric and multi-criteria optimization, as well as graph-analytical interpretation of experimental results are used. The formation of a single data bank ensures the preservation and systematization of information on design stresses and operational experience, which allows using the accumulated results at any stage of design and modernization of structures.
The results of the study allow establishing quantitative relationships between structural, technological and operational indicators, which ensures effective correction and improvement of car body structures. The proposed approach contributes to increasing the accuracy of durability prediction, the formation of rational design solutions and the creation of formalized models suitable for automated design. The use of the developed methodology allows you to reduce time and material costs in the design and modernization of bodies, as well as increase the reliability and safety of passenger car operation.
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