none

• Main Authors: ZHI-WEI WU, 吳智瑋
• Other Authors: Jiing-Yih Lai
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/c7ejg6

碩士 === 國立中央大學 === 機械工程學系 === 107 === Most CAD software in the market use the technique called direct modeling to build up models. However, most CAD software do not combine with features recognition in modifying. Doing the features recognition can make the modifying easier. When users need to change designs in many features, users need to choose the features by hand. This process causes lots of time. Therefore, our study develops a system to modify ribs in thin shell parts on Rhinoceros platform. And according to different types of ribs, our study develops five functions to modify. Our study uses the B-rep data structure and the results of rib feature recognition to build up the topology relationship between points, edges and faces. Using these information to translate surfaces or rotate surfaces after calculating the expected results. Moreover, changing the geometric information in order to achieve the design changes. For the modifying results, our study checks the difference of volume to be our rest on modifying successful or not.