Impact condition-considered simplified model modeling method suitable for early-stage design of automobiles

Abstract

The invention discloses an impact condition-considered simplified model modeling method suitable for early-stage design of automobiles. The method comprises the following steps of: carrying out overall structure decomposition on a modeling target automobile; determining a simplified modeling method corresponding to each decomposed structure on the basis of a modeling method provided by ADAMS software; after the simplified modeling method corresponding to each decomposed structure is determined, setting simplified modeling parameters to complete a simplified model construction process of each structure; integrating the constructed simplified models into a whole automobile model; and carrying out impact simulation test on the integrated whole automobile model and importing an adjustment coefficient K to adjust the impact simulation result. According to the method disclosed by the invention, the optimal design of impact simulation in the early-stage design of the automobiles is considered, so that the simulation results of the constructed models are more correct and reasonable, the method is concise, the efficiency is high, and the simulation time is short; and the method is suitable for the impact resistance optimal design in the early stage of structural design of the automobiles.

Description

technical field [0001] The invention belongs to the field of computer-aided design, and relates to a simulation modeling method, in particular to a simplified model modeling method suitable for early design of automobiles considering collision working conditions. Background technique [0002] In the evaluation of automobile safety, the crashworthiness of body structure is a key index. Due to the complex structure of the body and the need to meet the performance requirements of multiple disciplines (stiffness, strength, NVH, aerodynamics, crash safety, lightweight, etc.) at the same time, its design is difficult. [0003] Due to the need for a large number of simulation evaluations of design schemes in the development process of the car body, and the limitation of computing resources and development cycle, the current multi-objective optimization design for car body structures mainly focuses on structural stiffness, natural modes, etc., which have relatively low computing res...

AI Technical Summary

Problems solved by technology

[0003] Due to the need for a large number of simulation evaluations of design schemes in the development process of the car body, and the limitation of computing resources and development cycle, the current multi-objective optimization design for car body structures mainly focuses on structural stiffness, natural modes, etc., which have relatively low computing resource requirements. As for the crash condition, it is more considered as a performance verification condition after the above-mentioned multi-objective optimization work is basically completed, so it cannot guarantee that the collision safety goal will be met in the early design stage

[0004] In view of the fact that the crash conditions are only considered in the later stage of the car body design, the crashworthiness design of the car body can only be modified and adjusted for the local structure, which has the defects of small design freedom and high cost; therefore, it can be said that the development of high-precision, The high-efficiency, high-robust collision simulation simplified model modeling method enables the realization of the goal of optimizing the development of the full performance of the car body, which is of great significance for shortening the product design and development cycle and reducing development costs

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