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Abstract ▼ AI-Helper

Strong winds make motor-vehicle travel very uneasy and cause many traffic accidents. Research on wind tunnel tests concerning motor-vehicle accidents caused by strong winds are actually very few. Consequently, this paper is a wind tunnel experiment using model vehicles to investigate wind effect. Ef...

Strong winds make motor-vehicle travel very uneasy and cause many traffic accidents. Research on wind tunnel tests concerning motor-vehicle accidents caused by strong winds are actually very few. Consequently, this paper is a wind tunnel experiment using model vehicles to investigate wind effect. Effects of strong winds were investigated by testing the model vehicles in a course simulator at rest and in motion. Swerving distance of the wheel tracks from the center line as well as instances of overturning were investigated in the tests. The results show that in the case of truck, automobile and compact car models, the swerving distance of the wheel tracks increases as the wind contact area of the vehicle increases. It was also observed that the increase in speed of the model vehicle is nearly directly proportional to the increase in swerving distance of the wheel tracks. The primary cause of vehicle accidents involving strong wind is the situation when a traveling vehicle suddenly comes out of the tunnel and struck sideways by cross wind. In the case of bus, initial swerving occurs at wind velocity of 5-7 ㎧. Whereas in the case of automobile, initial swerving occurs at wind velocity of 13 ㎧ or higher. Furthermore, the relation between vehicle speed, wind velocity and swerving distance appears to be nearly directly proportional. It also appears that under the same wind velocity, wind effect by vehicle speed is relatively greater in the automobile than in the truck.

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