نتایج جستجو برای: offshore jacket platforms

تعداد نتایج: 70946  

Journal: :Journal of Marine Science and Engineering 2023

The potential collision between the ship and pipe piles of jacket structure brings huge risks to safety an offshore platform. Due their high energy-absorbing capacity, honeycomb structures have been widely used as impact protectors in various engineering applications. This paper proposes a data-driven intelligent approach for prediction response honeycomb-reinforced under collision. In proposed...

F. Azarsina, M. Tajari N. Ashrafi Khorasani

Explosion and fire on an offshore rig can lead to its minor or complete damage and sinking which means the loss of life or environmental pollution. Hence the use of techniques such as blast wall is crucial to reduce the detrimental effects. These blast walls are designed for explosion wave of length between 0.1 to 1 of load mainly to protect the personnel and critical sections. In this research...

Journal: : 2023

In this paper, an offshore platform subjected to dynamic loading for different damage cases was modelled via fluid-structure interaction (FSI) analysis. Different models were considered in the case where one leg broken, and Young’s modulus of damaged member reduced with four severity ratios. addition five structures, undamaged structure according two spacing conditions. Thus, compared among the...

2017
Yolanda Vidal Leonardo Acho Ignasi Cifre Àlex Garcia Francesc Pozo José Rodellar

Reset controllers are commonly used to smooth the transient response of systems. We use this technique to improve a standard baseline pitch controller for offshore wind turbines (WTs). The introduction of this strategy enhances the overall performance of the WT. In particular, the fore-aft and side-to-side accelerations of the WT tower are significantly reduced, whilst a steadier power output i...

Journal: :International Journal of Physical Modelling in Geotechnics 2017

2014
Hideki Nara Hiroshi Tanimoto Yasunori Tohjima Hitoshi Mukai Yukihiro Nojiri Toshinobu Machida

Methane is a substantial contributor to climate change. It also contributes to maintaining the background levels of tropospheric ozone. Among a variety of CH4 sources, current estimates suggest that CH4 emissions from oil and gas processes account for approximately 20% of worldwide anthropogenic emissions. Here, we report on observational evidence of CH4 emissions from offshore oil and gas plat...

2016
Yongxue Liu Chao Sun Jiaqi Sun Hongyi Li Wenfeng Zhan Yuhao Yang Siyu Zhang

Oil and gas exploration in the South China Sea (SCS) has garnered global attention recently; however, uncertainty regarding the accurate number of offshore platforms in the SCS, let alone their detailed spatial distribution and dynamic change, may lead to significant misjudgment of the true status of offshore hydrocarbon production in the region. Using both fresh and archived space-borne images...

2016
C. Tutivén Y. Vidal L. Acho

The main contribution of this paper is to propose new control techniques which not only provide fault tolerance capabilities to the WT system, but also improve the overall performance of the system in both fault free and faulty conditions. Coupled nonlinear aero-hydro-servo-elastic simulations of an offshore wind turbine with jacket platform are carried out. The proposed controllers are based i...

In offshore structures, most of failures are caused by the lack of sufficient piles strength. Scour phenomena affects the load transition and the pile strength. The necessity of the consideration of scouring phenomena amplifies when the scour depth becomes remarkable, which can endanger the jacket stability. In this paper, a new method is used to consider the pile scouring using nonlinear pusho...

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