Results 251 to 260 of about 11,917 (312)

Elastic Analysis of Submarine Pipelines

Journal of Structural Engineering, 1992
A submarine pipeline is idealized as a linearly elastic continuous beam subjected to vertical loads, and supported on a discretized frictionless seafloor profile. The structural analysis of this beam is considered as a unilateral contact problem. This paper presents two analytic solutions for the analysis problem under the small displacement assumption,
Poon‐Hwei Chuang, David Lloyd Smith
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Buckle propagation in submarine pipelines

International Journal of Mechanical Sciences, 1988
Abstract The pressure required for propagation of a buckle in a submarine pipeline was first investigated theoretically by Palmer and Martin [Buckle propagation in submarine pipelines. Nature254, 46–48] in 1975. Their analysis equated the work done by the pressure as the buckle advances to the energy absorbed by plane-strain plastic collapse of a ...
S. Kamalarasa, C.R. Calladine
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Buckle Propagation in Submarine Pipelines

Journal of Engineering Mechanics, 1992
A relatively simple approach is first presented for the approximate analysis of the collapse of circular rings under external pressure. It accounts for geometrical and material nonlinearities, and is able to approximate the precollapse and postcollapse behaviors of rings.
G. D. Hahn, M. She, J. F. Carney
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Submarine pipeline buckling—imperfection studies

Thin-Walled Structures, 1986
Abstract In-service buckling of submarine pipelines can occur due to the institution of axial compressive forces caused by the constrained expansions set up by thermal and internal pressure actions. Previous attempts at modelling the appropriate behaviour have been based on idealised or perfect pipelines; further, such analyses have also employed ...
Neil Taylor, Aik Ben Gan
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Lateral·stability Of Submarine Pipelines

Offshore Technology Conference, 1977
ABSTRACT The upper bound approach of the theory of perfect plasticity has been applied to develop a method for geotechnical stability analysis of unburied submarine pipelines. The coefficient of? lateral resistance of the soil and the corresponding displacements of the pipe depend on seven geometrical, loading and ...
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Buckle propagation in submarine pipelines

Nature, 1975
DURING its construction a submarine pipeline is at the same time bent and loaded by the external pressure of the sea. If it is bent too far, it buckles. If the local external pressure is small, the buckle is limited to a short kink on the compressed side of the pipe.
ANDREW C. PALMER, J. H. MARTIN
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Fatigue Analysis for Submarine Pipelines

Offshore Technology Conference, 1982
Abstract Purpose of this paper is the presentation of the techniques used in fatigue life forecasts for a submarine pipeline, which have been worked out during the design of the Tran Mediterranean Pipeline. The stress level imposed by supports configuration, pipeline weight, weight-pressure ...
Mario Celant, Giorgio Re, Stefano Venzi
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Movements Of Submarine Pipelines Close To Platforms

Offshore Technology Conference, 1981
Abstract An analytical model of expansion movements at the ends of pipelines is developed. A comparison with measurements on two North Sea pipelines shows that the analysis is consistent with observed behaviour, and can be used to assess the results of corrective action.
A. C. Palmer, M. T. S. Ling
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Submarine Pipeline Trenching by Multipass Ploughs

Offshore Technology Conference, 1985
ABSTRACT A major development program for large ploughs to trench submarine pipelines began in 1975, and has led to the construction of 13 ploughs, which have been used in many parts of the world. Deep trenches are best cut in a sequence of separate passes.
R.J. Brown, A.C. Palmer
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Hydraulic Trenching of Submarine Pipeline

Transportation Engineering Journal of ASCE, 1971
A consortium of oil companies commissioned two firms of contractors to construct, as a joint venture, a single buoy mooring system off the South African coast. It was planned to pull the pipes out to the sea through a sleeve to be placed in a trench blasted 600-ft rocky reef in the surf zone, and to bury the pipe on the seaward side of the reed between
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