Results 251 to 260 of about 11,989 (309)

Three-Dimensional Scour at Submarine Pipelines

Journal of Hydraulic Engineering, 2012
This paper presents results of an experimental study on three-dimensional scour at submarine pipelines with uniform sediment under a unidirectional current in clear-water conditions. The data show that propagation of the scour hole in the transverse direction of flow may be divided into a rapid and a slack phase of development.
Yee-Meng Chiew
exaly   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source

Submarine pipeline routing software

Computers & Structures, 1995
Routing of the pipeline is a very important aspect to be considered in the design and installation of submarine pipelines. Depending on the bathymetric conditions and the pipeline characteristic features, the bending stresses on the pipeline varies. These stresses will change and hence the design stresses on the pipeline cannot be taken as constant. To
M.R. Pranesh, A.S. Johnson
openaire   +1 more source

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
openaire   +1 more source

The Submarine Pipeline as a Structure

Offshore Technology Conference, 1970
ABSTRACT In the past, design of submarine pipelines has not taken full cognizance of the fact that such pipelines are structures and shouldbe designed as structures. The submarine pipeline is, in fact, an extremely complex structure. It is much more complex than many larger and more impressive surface structures.
openaire   +1 more source

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
openaire   +1 more source