Parametric instability of deep-water risers

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August undefined, 2024

WebMar 1, 2024 · Structural nonlinearity of the tensioner model affects parametric instability prediction of deep-water top tensioned risers 2024, Ocean Engineering Show abstract Study on dynamic responses of hydraulic pneumatic tensioner for a TLP under hydraulic component failure 2024, Applied Ocean Research Show abstract Webattention to the risers’ vortex-induced vibration as well as the parametric excitation. Nevertheless, the multi-frequency excitation and the higher-order instability zones are …

Numerical and Experimental Research on the Effect of Platform …

WebRiser structure, complex pre-stress, top-tensioned riser, parametric vibration, Mathieu instability Date received: 4 September 2024; accepted: 12 December 2024 Handling Editor: Jianqiao Ye Introduction With the growing demand for crude oil and gas in recent years, deep-water exploitation has become the focus of offshore equipment. pottery barn kids green hills mall

Parametric instability analysis of deepwater top …

WebJul 1, 2024 · Chatjigeorgiou and Mavrakos (2002) studied the case in which the frequency of the nonlinear resonance of the riser approximated the parametric excitation frequency, and considered the influence of damping. Their study showed that the instability caused by the parametric excitation cannot be ignored. WebThe study is focused in the parametric instability of the deep-sea risers due to the platform heave motions. As offshore hydrocarbon resources exploration and exploitation moving to much deeper waters, risers play more important roles than before, and face with many technological challenges. Webtrifugal and Coriolis force on the parametric instability of deep water drilling risers and found that Coriolis force can make the combination resonance much more profound. However, internal flow is not a steady single-phase flow, whereas a multiphase flow always includes oil, gas, and water. Given the low temperature and high pressure in pottery barn kids grinch plates

Instability Analysis of Parametrically Excited Marine Risers by ...

Internal flow effect on the parametric instability of …

WebOct 8, 2024 · The top-tensioned riser is an important equipment in offshore oil and gas development. The hydro-pneumatic tensioner is an essential device to ensure the safety of the top-tensioned riser. To investigate the dynamic performance of the marine platform hydro-pneumatic tensioner, this paper proposed a first-order Taylor approximation … WebJan 29, 2024 · The parametric vibration instability of a riser is studied in consideration of a complex pre-stress distribution. Differential equations of the riser are derived according … pottery barn kids grinch pjsWebSevere slugging in deepwater risers is a serious flow assurance problem that endangers the reliability of subsea production systems (pipelines, risers, and jumpers) by exposing them to fatigue loading, structural instability, and material damage due to its cyclic behaviour. Modelling this problem is very challenging because of its tough guy pose

"WebParametric Instability of Deep-Water Risers J. Brugmans Published 2005 Engineering During the last decade, some major changes took place in the offshore industry. These … " - Parametric instability of deep-water risers

Parametric instability of deep-water risers

Longitudinal Resonant Behavior of Very Deep Water Risers

WebMar 17, 2024 · The effect of platform heave motion on VIV of deep sea top-tensioned riser (TTR) is presented by means of numerical simulation and experiment in this research. First, the heave motion was modeled as a parametric excitation, and the governing equation of VIV of riser considering the parametric excitation was established. WebDuring the service period of a riser, the periodic heave motion of the top floating platform due to waves changes the axial force acting on the riser, thus leading to the parametric vibration of the risers. Parametric resonance is an unstable vibration caused by parametric excitation, which leads to the exponential increase in the vibration ...

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Webattention to the risers’ vortex-induced vibration as well as the parametric excitation. Nevertheless, the multi-frequency excitation and the higher-order instability zones are always neglected, and just the first instability zone is taken into consideration[5]. Once the multi-frequency parametric excitations are included, the influences WebDec 31, 2004 · This phenomenon is called parametric instability. The objective of this study is to gain better insight in this phenomenon. The focus is on the occurrence of instability …

http://publications.isope.org/proceedings/ISOPE/ISOPE%202421/data/pdfs_Vol2/2135-21TPC-0336.pdf WebThe instability charts of TTRs in several typical depths are numerically obtained using EPIM. The effects of factors such as the top tension ratio, the stiffness of the heave compensators, damping constant, and internal flow velocity on the instability region are analyzed.

WebMathieu instability analysis of deepwater top-tensioned risers. Journal of Ship Mechnics, 2014. [10] Tang Yougang, Shao Weidong, Wang Liyuan, Gui Long. Dynamic response analysis for coupled parametric vibration and vortex-induced vibration of top-tensioned risers in deep-sea. Engineering Mechnics, 2013. [11] Kuiper G L, Brugmans J, Metrikine AV … WebThis phenomenon is called parametric instability. The objective of this study is to gain better insight in this phenomenon. The focus is on the occurrence of instability for deep-water risers induced by the variation of the effective tension in time.

WebDec 1, 2024 · The instability diagram differed significantly from that for single-frequency parametric excitation. From the above review, it is seen that a number of investigations have focused on the Mathieu instability problem while ignoring transverse loading on the TTRs.

WebAn analysis of parametric instability of risers Vortex-Induced Vibration (VIV) of Deep Water Riser - Duration: 0:13. University of ULSAN, Adv Comp Eng Lab À°YP ÈpÁ 瓅醬妽耀 CFD/貹壂È瀀泂 578 views 0:13 Riser Analysis In Abaqus - auto.joebuhlig.com Modeling Contact using the General Contact method in Abaqus This article is tough guy products manufacturerWebThis paper discusses modeling aspects related to dynamic analysis of deep water drilling risers. These risers must have a heave compensator that maintains a near constant tension in the riser independent on platform motions. Traditional riser analysis will apply constant top tension or a simple parametric model that may give approximate tension ... pottery barn kids grocery standWebJun 20, 2024 · The parametric resonance, which could induce severe consequence like fatigue, and further lead to oil-spill risk, has been vastly discussed in about the offshore pipelines. In this paper, a top-tensioned riser has been modelled, and the parametric instability of such structure has been analyzed with Differential Quadrature Method (DQM). pottery barn kids grinch table