A computer aided design method for car form and its application based on shape parameters |
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Authors: | Fan LIU Xiaomin JI Gang HU Jing GAO |
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Affiliation: | 1. School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China2. School of Art and Design, Xi’an University of Technology, Xi’an 710054, China3. School of Sciences, Xi’an University of Technology, Xi’an 710054, China |
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Abstract: | In the early design stage, automotive modeling should both meet the requirements of aesthetics and engineering. Therefore, a vehicle CAD (computer aided design) model that can be easily adjusted by feedbacks is necessary. Based on CE-Bézier surface, this paper presents a set of algorithms for parametric segmentation and fairing surface generation in a car model. This model is defined by a simplified automotive template and relevant control points, shape parameters and segmentation parameters, which can be modified to alter the car form efficiently. With this model and the corresponding adjustment method, more than fifty various vehicle models are established in this research according to different parameters. And two methods for calculating similarity index between car models are constructed, which are suitable for brand design trend analysis and modelling design decisionmaking. |
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Keywords: | CAD car form design parametric adjustment CE-Bézier surface form similarity |
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