Structure Reverse And Analyse Of Turtle Shell

In recent years, reverse engineering has been an important part of advanced manufacture technology, and an important method of technical track. The current reverse is mostly the material object reverse of product, but product has to be optimized continually, technical track has to be progressing continuously; nature creates many complicated structure, such as turtle shell, which tends to perfectly by natural optimization of several hundred-million years, and which can resist compression and decrease resistance. Therefore, study to the structure of turtle shell is important to both theory and practice.Turtle shell is taken as object of study in this paper, after analyzing and comparing several familiar data measure manners, the Coordinate Measuring Machines which is mature and accurate is selected to measure turtle shell. Data processing technique is studied thoroughly, and the scanning beam data simplification arithmetic combined the least distance method and vector angle method is advanced in this paper. Pro/ENGINEER Wildfire2.0 is taken as software platform, reverse engineering technique based on Pro/ENGINEER is researched minutely. And the surface reconstruction method called"Take the boundary as the center"is studied minutely, a method which can reconstruct simple free surface by Pro/SCAN-TOOLS is advanced in this paper, then the data point cloud of turtle shell after data processing is reconstructed by combining Pro/SCAN-TOOLS and Modelling tool, which is belong to Pro/ENGINEER, then getting slick original free surface of turtle shell. After reconstructing, the surface reconstruction error and its source are analyzed.The method that using Pro/Mechanica to do finite element analysis is studied in this paper, and structure analysis for the entity model of turtle shell is done detailedly. By amending and analyzing on the foundation, a substitute model of turtle shell which is easier to manufacture is found. Then, a contrast of structure analysis between substitute model of turtle shell and ball-crown shellmodel is down for study the mechanics performance of turtle shell.