| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 96 === ABSTRACT
This thesis discusses the use of Pro/Mechanica in Pro/ENGINEER to solve the problem of deformation of a cooling fan in a PC server which was caused by applying an external force on the server. It is hoped that the results obtained from the CAE analysis can be used as good reference for future design change.
The work flow of using Pro/Mechanica to undertake the CAE analysis is as follows:
1. Pre-processing of the 3D CAD model: The tasks include: (1) build the 3D CAD model of PC server, (2) set up empirical rules to solve the problem of failure in generation of middle surfaces of sheet metal parts, and (3) supply density, Yang’s modulus and Poisson’s ratio of the sheet metal material.
2. Mesh generation: Generate meshes for both sheet metal parts and sheet metal assembly.
3. Set up boundary conditions: Set up the mating conditions between sheet metal parts.
4. Post-processing: By assembling one part an a time, check whether all the requirements for conducting the static analysis are fulfilled and no geometric problems exist to hinder the analysis process. The calculation of stress and deformation are then taking place.
5. Formulate the strategy to solve the problem of fan noise: The resultant data of stress and deformation can be used as a reference to make a design change of the fan base. A CAE analysis can then be undertaken on the entire PC server equipped with the revised model of fan base. The analysis results can be compared with those acquired from the original design.
6. Physical experiments: Run physical experiments to verify the CAE results by comparing the data in both cases.
The Pro/Mechanica analysis conducted in this thesis offers a good reference for mechanical engineers to deal with similar problems in structure design. It exposes the feasibility of leading a correct direction to design change, so as to shorten the product development time and relevant design expenses.
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