Automobile body-in-white light weighting analysis method

Abstract

The invention provides an automobile body-in-white light weighting analysis method. The method comprises following steps: setting each optimization size of automobile body-in-white as a design variable and setting the modal frequency value of each stage, bending rigidity value, torsional rigidity value and maximum principal stress at all extreme work conditions of the automobile body-in-white as target functions; performing experiment design and simulation calculation on each design variables to obtain response function values corresponding to each design variable and according to the response function values, establishing a simulation model; based on the simulation model, performing multiple discipline and multi-target optimization on the design variables to obtain Pareto solution set of the variables. According to the automobile body-in-white light weighting analysis method of the invention, through selecting proper design variables, analysis methods and technical routes, the light weighting of automobile body-in-white is realized and at the same time, on the basis of satisfying multiple discipline and multi-target, the optimized size parameters of the automobile body-in-white among all performances can be found.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a lightweight analysis method for an automobile body-in-white. Background technique [0002] With the rapid development of the domestic automobile industry, the penetration rate of automobiles is getting higher and higher, and the product development capabilities of major domestic automobile companies have also made great progress. At present, how to design and develop products that are more suitable for customers, how to shorten the development cycle of new models, reduce development costs, and improve development quality are new issues that every automobile company needs to solve. At the same time, with the increasingly stringent automobile emission, fuel consumption and collision safety regulations, the weight of automobiles is also required to be continuously reduced. Automobile lightweight technology has become a difficult and hot research point in the industry, such as ...

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Problems solved by technology

However, how to select design variables, analysis methods and technical routes has always been a difficult problem for technicians, which limits the research on the lightweight of automobile body-in-white to a certain extent. Moreover, after weight reduction, whether various performances of automobile body-in-white can meet Design requirements, and which parts still have potential weight reduction space, are also issues that designers need to consider

Not only that, the current research on the lightweight of automobile body-in-white usually adopts the analysis method of a single discipline (research target), and the interconnection and mutual influence of various disciplines, the analysis of a single discipline is not comprehensive and cannot be analyzed. Find the optimal solution among various performances on the basis of satisfying multiple disciplines and multiple goals

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