Shape optimal design of the Welded Bellows

• Main Author: 柯誌偉
• Other Authors: Yeh-Liang Hsu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/61839825480049247778

碩士 === 元智大學 === 機械工程學系 === 92 === ABSTRACT The welded bellow is an important component of the semiconductor vacuum equipment. It is composed of several hollow rings assembled by welding. The welded bellow often fails in the welding zone. The main purpose of this thesis is to find the optimal cross-sectional shape which reduces the stress in the welding zone. The cross-sectional shape optimization is done by varying the location of the control points. Two algorithms were used. One is a gradient type algorithm, and the other is by the Fuzzy proportional derivative Controller method. With both methods, we can get the cross-sectional shape which to reduces the maximum stress for about 11%.