Reverse Design Of The Door. And Finite Element Analysis

Reverse engineering is one of the focuses in advanced manufacturing technologieswhich can shorten the periods of designing and manufacturing. While finite elementanalysis can improve the quality of the products and reduce the cost of production. Withthe application of them, reverse designing and finite element analysis of the hatch gate areresearched in this thesis.This thesis summarizes primary measure methods of reverse engineering andmeasures hatch gate by the CMM, and then preprocesses the gotten data. The surfaceremodeling method is studied in the thesis by means of geometric modeling in UG NX4software including the curve remodeling by sectional scanning curves and the surfaceremodeling by using "through curve mesh", thus surface of hatch gate is remodeled well.Based on this, details of structure of the hatch gate is performed and then finite elementanalysis of the hatch gate is made by advanced simulation of UG NX4.The strength andstiffness of the hatch gate's structure are analyzed, and then evaluation is given for thedesign of the hatch gate's structure. For the "free-free" boundary condition the vibrationmodes of the hatch gate are researched, natural frequencies and mode shapes are solved.For preventing from the destroying of resonance, vibration characteristics of the hatch gateis performed. Size and structure of the strengthen rib are optimized. As a result, the wholecharacteristic is meliorated, the mass of the hatch gate is decreased by 8.06 percent, thecost of production is effectively reduced and it is applied well in practice.