| Summary: | 碩士 === 國立交通大學 === 土木工程學系研究所 === 85 === The main purpose of the paper is to investigate the stress concent
ration effect of chimney structure with openings . Plate element is em
ployed to build models for analysis of chimney with no opening, single op
ening and two openings. The commercial F.E.M. Package, ANSYS 5.1, is used
to analyze these models in this research.First, the stresses of chimneys w
ith no opening and single opening are studied. Second, the chimneys with di
fferent angle between two openings are analyzed in order to compare the s
tresses with that of the chimney with no opening. Finally, the two openings
and the shell between the two openings are treated as a big opening by eli
minate the shell, and then the stress concentration factor is compared to
that with two openings in order to obtain the corresponding critical angle b
etween the two openings. The correspondent critical angle is found for vary
ing opening angle. Hence , some modifications for designing chimney
shell are recommended in accordance with the results.
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