Blar i NTNU Open på forfatter "Longva, Vegard"
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Algorithmic formulation of clay and sand pipe–soil interaction models for on-bottom stability analysis
Longva, Vegard; Ji, Guomin; Sævik, Svein; Ye, Naiquan; Gjøsteen, Janne Kristin Økland; Giertsen, Egil; Wang, Yanbin (Peer reviewed; Journal article, 2021)This paper presents a new algorithmic formulation of the clay and sand pipe–soil interaction models recommended by the DNV-RP-F109 code for dynamic on-bottom stability analysis of submarine pipelines. The pipe–soil force ... -
Formulation and Application of Finite Element techniques for Slender Marine Structures Subjected to Contact Interactions
Longva, Vegard (Doctoral thesis at NTNU;2015:99, Doctoral thesis, 2015)The main purpose of this work is to formulate and apply new computational strategies for two contact-governed problems where existing finite element software suffer from poor efficiency and lack of robustness. The first ... -
On prediction of torque in flexible pipe reeling operations using a Lagrangian-Eulerian FE framework
Longva, Vegard; Sævik, Svein (Journal article; Peer reviewed, 2016)In this paper a new framework for FE simulation of reeling operations that utilizes a Lagrangian–Eulerian description of the beam kinematics is proposed. In contrast to the conventional Lagrangian approach, the material ... -
Reduction of trawl impact loads on pipelines resting exposed on the seabed
Krogstadmo, Truls Wanvik (Master thesis, 2019)I dag finnes havbunnsinstallasjoner rundt omkring i Nordsjøen og Barentshavet med rørledninger som strekker seg totalt over 8800 kilometer på norsk sokkel. Rørledninger eksisterer rundt offshore-anlegget og er koblet til ... -
Simulation of Trawl Loads on Subsea Pipelines
Longva, Vegard (Master thesis, 2010)The main objectives in this thesis was to investigate the effect of oblique trawl board crossings, increased trawl board added mass due to seabed proximity and the effect of a more rectangular trawl board geometry. In ...