As a high-rise structure,the safety of chimneys has always been a public concern.In this paper,the damage condition,tilting,and the strength of load-bearing materials of the chimney were inspected,and the inspection c...As a high-rise structure,the safety of chimneys has always been a public concern.In this paper,the damage condition,tilting,and the strength of load-bearing materials of the chimney were inspected,and the inspection conclusions and maintenance suggestions were given based on the inspection results.The inspection method can provide relevant reference for the inspection of similar structures.展开更多
A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used...A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used in the method. First the CAD data of workpiece areextracted and recognized automatically. Then a workpiece model is generated, which is theintegration of pure 3D geometry form with its corresponding inspection items. The principle ofworkpiece modeling is also presented. At last, the experiment results are shown and correctness ofthe model is certified.展开更多
文摘As a high-rise structure,the safety of chimneys has always been a public concern.In this paper,the damage condition,tilting,and the strength of load-bearing materials of the chimney were inspected,and the inspection conclusions and maintenance suggestions were given based on the inspection results.The inspection method can provide relevant reference for the inspection of similar structures.
基金This project is supported by National Natural Science Foundation of China (No.59675083,50075064).
文摘A CAD/CMM workpiece modeling system based on IGES file is proposed. Themodeling system is implemented by using a new method for labelling the tolerance items of 3Dworkpiece. The concept―'feature face' is used in the method. First the CAD data of workpiece areextracted and recognized automatically. Then a workpiece model is generated, which is theintegration of pure 3D geometry form with its corresponding inspection items. The principle ofworkpiece modeling is also presented. At last, the experiment results are shown and correctness ofthe model is certified.
