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Proceedings of CAD'17, 2017, 149-153
Extraction of Vertical Cylinder Contacting Area for Motorcycle Safety Verification

Masatomo Inui, Nobuyuki Umezu, Ibaraki University

Abstract. Japanese motorcycle manufactures define several safety regulations regarding the motorcycle shape to prevent injury to pedestrians in the event of a crash. Fig. 1 illustrates one regulation regarding the motorcycle shape. Consider a vertical cylindrical column 300 mm in diameter. This column approximates a human body shape in the standing position. To inspect compliance with the regulation, a motorcycle is moved forward and eventually pushed into the column. In this way, surface areas on the motorcycle are detected where the column is able to make contact. According to this regulation, such surface areas must have a radius greater than R3.2 (usually, R4.0 is used instead to be conservative). Currently, the safety regulation regarding the shape is inspected by specialists at the final design stage with physical apparatus and models. This work is cumbersome, time consuming, and prone to human errors, and the detection of safety issues at this stage causes costly re-works. A fast and automatic inspection method that allows designers to check the regulations themselves during the shape design process is desirable. To assist designers, we propose a novel method for extracting surface regions on a motorcycle body where the vertical cylindrical columns collide and their radius is less than R4.0.

Keywords. Contact Analysis, Offsetting, Curvature Evaluation, Parallel Processing, GPU

DOI: 10.14733/cadconfP.2017.149-153