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URN etd-0706106-164829 Statistics This thesis had been viewed 2138 times. Download 2463 times. Author Chen-Hsuan Lo Author's Email Address No Public. Department Industrial Design Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 100 Title A Study of Constructing Triangular Surface of the Computer Aided Industry Design for 3D Modeling Keyword triangular curved surface industrial design Gaussian curvature dividing position cutting position 3D curved surface 3D curved surface cutting position dividing position Gaussian curvature industrial design triangular curved surface Abstract Abstract
In the industrial design process, the greatest difference between computerization and non-computerization lies in the establishment of 3D virtual data. After the designer completes the 2D impression, 3D data will be established for configuration conceptualization.
In the process of 3D construction, most of the curved surfaces of the configuration can be constructed via the quadrilateral surface construction method. Other than curved surfaces that can be completed through the quadrilateral surface construction method, construction staffs in the production process often encounter triangular curved-surface construction challenges such as: curved-surface configuration discrepancies, insufficient degree of saturation, undulated surfaces and distortion. As a result, it becomes difficult to make the physical section of the curved surfaces, and mechanism designers are unable to engage in 3D mechanism design. The development schedule is delayed, and introduction of the product to the market has to be postponed. The company has to sustain significant losses because of missed business opportunities. How to construct correct triangular curved surfaces, consequently, has become an extremely important issue confronting every designer and modeling maker.
This study engages 3D software Alias Studio in computer simulation and curvature analysis. The result has indicated, in the process of producing triangular curved surfaces, the modeling maker first determines the minimum curvature value (rmin) of the curved line to be divided. The optimal dividing position is supposed to be between 1.9rmin and 5.4rmin, and the cutting position needs to fall within the range between the parameter 0.05 and 0.45 on the center line. Meanwhile, 16 designers were chosen as experiment subjects for verification. Experiment outcomes have shown this approach can resolve problems such as unsmooth, distorted curved surfaces and construct accurate, comprehensive triangular curved surfaces that can be utilized in mechanical design and die setting.
Keywords: industrial design, 3D curved surface, triangular curved surface, Gaussian curvature, dividing position, cutting position
Advisor Committee Cherng-Yee Leung - advisor
Chih-Fu Wu - co-chair
Nian-Jsan Wang - co-chair
Files Date of Defense 2005-07-29 Date of Submission 2006-07-06