Dynamic evaluation of jack-up platform structure under wave, wind, earthquake and tsunami loads

Ghazi, Zaid Mohammed; Abbood, Imad Shakir; Hejazi, Farzad

doi:10.1016/j.joes.2021.04.005

Cited by 22 publications

(3 citation statements)

References 25 publications

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“…Because of this, it is simple to derive the equations of motion for the JuR by first determining the equations of motion for each leg and the upper hull separately, then integrating them, while enforcing the constraints of deformation compatibility and force equilibrium at the intersections of the legs and the hull. Dynamic equations of motion-related topics are discussed in detail in [19][20][21][22][23][24], where the dynamic motion model is impacted by internal elements, including stress and stiffness [25], as well as environmental elements [26]. There are six degrees of freedom at each nodal point:…”

Section: Mathematical Model Of the Jacking Control Systemmentioning

confidence: 99%

Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment

Dang

Tran

et al. 2022

Polish Maritime Research

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Oil and gas projects differ from regular investment projects in that they are frequently large-scale, categorised as vital national projects, highly technological, and associated with significant risks. Drilling rigs are a crucial component of the oil and gas sector and the majority of the systems and equipment aboard drilling rigs are operated automatically. Consequently, it is crucial to address the topic of an advanced control theory for off-shore systems. Network technology connected to control is progressively being used to replace outdated technologies, together with other contemporary technologies. In this study, we examine how to adapt a networked control jacking system to the effects of internal and external disturbances with a time delay, using a Fuzzy controller (FC)-based particle swarm optimisation. To demonstrate the benefit of the proposed approach, the developed Fuzzy Particle Swarm Optimisation (FPSO) controller is compared with the fuzzy controller. Finally, the results from simulations and experiments utilising Matlab software and embedded systems demonstrate the suitability of the proposed approach.

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Section: Mathematical Model Of the Jacking Control Systemmentioning

confidence: 99%

Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment

Dang

Tran

et al. 2022

Polish Maritime Research

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“…As the marine environment comprised 70% globally, the potential of smart materials being used in these surroundings is very promising. Currently, conventional rubber-based materials are widely used in many marine-related applications, particularly for isolating the unwanted vibration of offshore structures caused by wave or earthquake load, this catastrophic leads to a reduction in service life and fatigue failure of the offshore platforms 1 , 2 . With the limitation faced by these conventional rubber materials, there is a need for replacing them with rubber-based smart materials that can prolong the performance of the product.…”

Section: Introductionmentioning

confidence: 99%

The effect of salt water ageing on the mechanical and rheological properties of magnetorheological elastomer

Khairi

Mazlan

Ubaidillah

et al. 2023

Sci Rep

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This paper aims to investigate the mechanical and rheological properties of magnetorheological elastomer (MRE) in marine ecosystems. The prepared samples comprised silicone rubber (SR) and 70 wt% micron-sized carbonyl iron particles (CIPs), immersed in an artificial marine ecosystem using salt water (Natrium Chloride) for 30 days. The mechanical properties of MRE samples were evaluated using hardness and quasi-static tensile tests. While the rheometer was used to investigate the rheological properties of their storage modulus condition with magnetic field stimulation. Further analysis of the defects and damages caused by salt water ageing was done through morphological observation using scanning electron microscope (SEM) technology. The results showed that the hardness and tensile strength of MRE samples that were soaked in salt water were affected over time. Lower values of hardness and tensile strength were obtained after 30 days due to the presence of Na+ and Cl−, which acted as an accelerator to the hydrolyzation process of the MRE. The process then, enhanced the water ingress capability into the matrix to cause the molecular changes. Interestingly, for rheological properties, 30 days of salt water ageing allowed the water molecules to move the MRE matrix molecular chains apart, a process known as plasticization and thus increasing the MR effect. Furthermore, morphological evidence was established to determine the MRE changes during salt water ageing. The research findings should greatly contribute to a better understanding of the effect of salt water on the performance of MRE.

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“…There are three methods to analyze seismic action: seismic coefficient method, response spectrum method and time history method [1]. The seismic coefficient method is only used for preliminary calculation because of its poor accuracy in seismic action analysis [2].…”

Section: Introductionmentioning

confidence: 99%

Seismic analysis of jack-up platform based on response spectrum method

Zhang

Qian

Gao

2023

Second International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2023)

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To verify the capability of the jack-up platform during earthquake, the seismic analysis based on spectrum response method is studied. First SACS analysis model of the platform is established, then the vibration mode shape and seismic response is analyzed, and finally the loads exacted from seismic response are combined with the gravity loads, and member and joint code check is executed. The calculation and analysis results show that the target jack-up platform meets the strength requirements under the design seismic load.

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Dynamic evaluation of jack-up platform structure under wave, wind, earthquake and tsunami loads

Cited by 22 publications

References 25 publications

Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment

Jacking and Energy Consumption Control Over Network for Jack-Up Rig: Simulation and Experiment

The effect of salt water ageing on the mechanical and rheological properties of magnetorheological elastomer

Seismic analysis of jack-up platform based on response spectrum method

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