Results 261 to 270 of about 472,437 (333)

Research on 3-D Precise Mapping System for Deformation Defects of Submarine Pipeline

Marine Technology Society journal, 2023
The submarine oil pipeline has many advantages, such as large oil transportation capacity, and being fast and economical. However, long-term laid submarine oil pipelines are affected by reciprocating load of water flow, subsidence caused by soil ...
P. Zhou, Xiaoqin Peng, Haipei Zhu, Xueyu Ren, P. Lin, Kaichuang Wang, Haonan Li, Zhonghui Zhou, Jia-wang Chen, Jun Li, Xuehua Chen, Guomin Cao, Xuyun Gao   +12 more
semanticscholar   +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

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
openaire   +1 more source

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 ...
openaire   +1 more source

AUV Optical Vision Submarine Pipeline Inspection

International Service Availability Symposium
In order to meet the practical needs of regular inspection of submarine pipelines, an optical vision inspection method for submarine pipelines mounted on Autonomous Underwater Vehicle (AUV) is proposed. Methods by improving the dark channel algorithm, an
Jiaguang Wei
semanticscholar   +1 more source

CFD and machine learning approach based-predictive modeling of scouring below submarine pipeline under wave and current condition

Marine Georesources & Geotechnology
The major free spans of submarine pipelines, caused by the combined action of waves and currents can pose significant risks to pipeline operational safety.
Zongxiang Xiu, Chenwei Luo, Lejun Liu, Xing Du, Wen Gao, Yupeng Song, Bing Shi, Wanqing Chi   +7 more
semanticscholar   +1 more source