Method of generating two-wheeled vehicle dummy model and apparatus for performing a collision simulation of a two-wheeled vehicle

Abstract

A method of and an apparatus for performing a collision simulation on a two-wheeled vehicle using a virtual model of a dummy developed for use on four-wheeled vehicles.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method of generating a two-wheeled vehicle dummy and an apparatus for performing a collision simulation on a two-wheeled vehicle. More particularly, the invention relates to a method of and an apparatus for performing a collision simulation of a two-wheeled vehicle using an FEM (Finite Element Method) model of a dummy that is developed for use on four-wheeled vehicles in a virtual three-dimensional space constructed on a computer. BACKGROUND OF THE INVENTION [0002] There have been known collision simulation tests where a vehicle carrying a dummy simulating a passenger is actually driven into collision with an obstacle and damage caused to the vehicle and the passenger is evaluated. However, collision tests that employ actual vehicles and dummies are expensive and require a long preparatory period because the vehicle is destroyed and the dummy is damaged in each test. If a collision is simulated in a virtual three-dimen...

AI Technical Summary

Benefits of technology

[0018] According to the above features, since the openings of the dummy are combined with shell elements, if a contact condition is set for them, then parts tending to enter the openings are brought into interference with the shell elements, and are prevented from moving through the openings or from being dented in.

Problems solved by technology

However, collision tests that employ actual vehicles and dummies are expensive and require a long preparatory period because the vehicle is destroyed and the dummy is damaged in each test.

When an impact is imparted to a virtual model of a vehicle and a virtual model of a dummy and their behaviors are analyzed on an impact / structure analyzing software program developed for analyzing a nonlinear phenomenon, problems arise in that parts which should collide with each other may move through each other or a part which will not actually be dented in may be dented in.

Therefore, problems arise if the conventional dummy for a four-wheeled vehicle is applied directly to two-wheeled vehicles.

On virtual models of conventional four-wheeled dummies, contact conditions cannot be defined for those regions because no face data are present in the above openings.

As a result, the behavior may not be converged and the simulation may be stopped, or even when simulation results are obtained, they may not be reliable enough.

Since the simulation apparatus is unable to perform normal calculations if contacting elements are present from the outset, the simulation apparatus fails to produce simulation results.

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