Back To The Transformation Of Mechanical Parts Design Flaws In The Analog Identification Study

In order to enhance design verification efficiency of mechanical products at initialdesign stage, framework of analogy identification for parameter design defects ofrotational mechanical parts is proposed, model, algorithm and key technologies foranalogy identification of parameter design defects are studied deeply and systemly inthis thesis.Topology information of mechanical parts is expressed in form of structure code,which expresses relationship of functional aspects of mechanical parts. Model retrievalmethod for recognizing structure codes is used for searching series category of thedesigned part in the mechanical model library. According to the mapping relationsbetween functional aspect parameters and basic dimensions, automated process forextracting basic dimension parameters from mechanical parts is implemented.Similarity measure method is proposed by treating similarity criteria number ascharacteristic attribution. This method is used to compute the similarity degree betweenthe designed part and each part in the same series of mechanical parts library, and findwhich one is the most similar with the designed part. Three-layer hierarchical analogyidentification algorithm for parameters design defects of rotational mechanical parts isproposed, analogy identification for defects existed in each layer design parameter ofthe designed part is realized based on similarity theory, according to the modelparameters of the most similar part, unreasonable parameters can also be optimized.Based on above model and method, parameter design defects existed at initial designstage of GY-type flange coupling and KL-type slider coupling are identified effectively,design parameters are optimized then.Analogy identification model and methodology proposed in this thesis can beemployed to find large numbers of obvious design defects for rotational mechanicalparts at initial design stage, design quality and design efficiency for rotationalmechanical parts can be improved, and development cycle can be shorten effectively.