Frame tripping in ring stiffened externally pressurised cylinders

This paper addresses the problem of designing ring frames in externally pressurised cylinders to avoid sidesway tripping. A closed form solution is proposed for the elastic tripping pressure, including the effect of the rotational constraint provided by the shell to the toe of the web as well as the...

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Bibliographic Details
Published in:Marine structures 1996, Vol.9 (6), p.585-608
Main Authors: Morandi, A.C., Faulkner, D., Das, P.K.
Format: Article
Language:English
Subjects:
Applied sciences
Buckling
Buildings. Public works
Cylinders (containers)
Deformation
Elastic moduli
Exact sciences and technology
external pressure
Hydraulic constructions
Marine
Marine engineering
Naval architecture
Offshore structure (platforms, tanks, etc.)
Safety factor
Shells (structures)
stiffened cylinders
Structural design
tripping
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Summary:This paper addresses the problem of designing ring frames in externally pressurised cylinders to avoid sidesway tripping. A closed form solution is proposed for the elastic tripping pressure, including the effect of the rotational constraint provided by the shell to the toe of the web as well as the web deformation effect. Such theory compared reasonably well with numerical results given by ABAQUS as well as BOSOR4 and N9E. The differences become unimportant when a column curve is used for inelastic tripping, calculated with a structural tangent modulus approach. A safety factor for preliminary design is proposed based on parametric studies.
ISSN:0951-8339
1873-4170
DOI:10.1016/0951-8339(95)00020-8