大型结构件的逆向设计方法研究

发布时间：2018-05-27 12:30

本文选题：逆向工程 + 全站仪测量　；参考：《长春理工大学》2013年硕士论文

【摘要】：逆向工程包含了现代化设计方法、计算机辅助测量、CAD、CAM等许多高科技技术。本文所讨论的大尺寸结构件逆向设计方法,其流程是先根据实物测得点云数据,然后对点云数据进行预处理,再根据处理过的点云数据构建CAD模型,最后对模型进行分析。本文对逆向工程进行了简要的介绍,重点阐述大型结构件逆向设计的相关技术,如测量方式、数据处理、模型重构等,并以某挖掘机动臂为研究对象对大型结构件逆向设计进行研究。运用了全站仪对动臂进行数据采集,将点云数据在Imageware中做预处理,然后放入UG中完成曲面重构,并在ANSYS Workbench中进行有限元分析。模型分析表明点云与曲线、曲面的误差在尺寸误差允许的范围内；模型的许用应力在屈服极限以下；产生形变的振动频率在工作频率之外。上述结论检验了模型的精确度和可操作性,从而证明运用全站仪测量大型结构件的逆向设计方法的可行性和实用性。
[Abstract]:Reverse engineering includes many high-tech technologies, such as modern design method, CAD / CAM and so on. In this paper, the reverse design method of large scale structural parts is discussed. The flow chart is to get point cloud data according to physical object, then preprocess point cloud data, then construct CAD model according to the point cloud data processed, and finally analyze the model. This paper gives a brief introduction to reverse engineering, focusing on the related techniques of reverse design of large structural parts, such as measurement, data processing, model reconstruction, etc. The reverse design of large-scale structural parts is studied with the moving arm of a excavator as the research object. The point cloud data is preprocessed in Imageware, then the curved surface is reconstructed in UG, and the finite element analysis is carried out in ANSYS Workbench. The model analysis shows that the error of point cloud and curve and surface is within the allowable range of dimension error, the allowable stress of the model is below the yield limit, and the vibration frequency of producing deformation is beyond the working frequency. The above conclusions verify the accuracy and maneuverability of the model and prove the feasibility and practicability of the reverse design method for measuring large structural parts with total station.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH122

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