Digital dummy model modeling method based on multi-rigid-body and finite element coupling calculation

Abstract

The invention relates to a digital dummy model modeling method based on a multi-rigid-body and finite element coupling calculation in the field of traffic accident safety, which comprises the following steps of: establishing a standard digital dummy model library which respectively comprises each body part model of a multi-rigid body digital dummy and each body part model of a standard finite element digital dummy; designing a new standard digital dummy model, and selecting LS-DYNA module is selected from coupling software of Madymo; ; defining a hinge and adjusting contact in the coupling module, generating a complete new standard digital dummy model by utilizing the standard multi-rigid body and the digital dummy model of each part of the standard finite element, and finally verifying the new model through coupling simulation calculation; and outputting and verifying the new standard digital dummy collision parameters. According to the method, the advantages of the two software can be brought into full play through a coupling solving calculation method, and the robustness of collision simulation calculation of the digital dummy model is greatly enhanced.

Description

technical field [0001] The invention relates to the field of traffic accident safety, in particular to a digital dummy model modeling method based on multi-rigid body and finite element coupling calculation. Background technique [0002] With the rapid development of the automobile industry, the safety of traffic accidents has attracted more and more attention. It has always been a concern of automobile developers. Pedestrians are at a disadvantage in traffic accidents, and they are often more important than drivers in cars. Pedestrians are more vulnerable to injury, so the realization of traffic accident reconstruction is of great significance to the development of automobile safety and pedestrian protection, and then how to reduce the damage to pedestrians in traffic accident collisions has become a research and problem to be solved in various countries. . [0003] Since real human bodies cannot be used in real-world crash tests, dummies are the only viable option, and th...

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Problems solved by technology

However, the finite element digital dummy model used is too simple to simulate the damage of blood vessels and visceral fat in the human body; and the calculation accuracy is not high. The calculation accuracy depends not only on the accuracy of the digital dummy model, but also on the simulation solution. For the accuracy of the model and solver, the modified patent only uses the Madymo multi-rigid body solver to solve. Although the finite element part can be calculated in Madymo software, there is still a certain accuracy gap compared with the LS-DYNA finite element solver; And the dummy established by this method does not use the coupling effect, because the material model in the Madymo software is much less than the material model in the LS-DYNA software, which will make the material of the finite element digital dummy model imported into the Madymo software A lot is missing, and the material model is the most important part of the finite element digital dummy, so the established digital dummy model does not meet international standards; and its digital dummy model is only 50 percentile male and 05 percentile 1st female digital dummy model, there is no standard 3-year-old and 6-year-old digital dummy model and 95 percentile large-sized male digital dummy model, lacking versatility and universality

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