Nonlinear coupled dynamic response of offshore Spar platforms under regular sea waves

Agarwal, Ankit; Jain, Arvind K.

doi:10.1016/s0029-8018(02)00024-0

Cited by 26 publications

(11 citation statements)

References 9 publications

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“…The heave motion of structure in large amplitude might cause fatigue damage to the mooring system under vertical wave force acting on the bottom. A.K.Agarwal and A.K.Jain studied the coupling dynamic response of Spar platform in the deep water under regular wave [13] . The Spar is modeled as a rigid body with 6 degrees-of-freedom, connected to the sea floor by multi-component catenary mooring lines.…”

Section: The Tension Caused By Coupled Motion Of Mooring System and Fmentioning

confidence: 99%

Development of study on the dynamic characteristics of deep water mooring system

Tang

Zhang

et al. 2007

J. Marine. Sci. Appl.

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To meet the needs of those exploiting deepwater resources, TLP and SPAR platforms are used in some areas and are considered excellent platforms in deep water. However, many problems remain to be resolved. The design of mooring systems is a key issue for deep water platforms. Environmental loads in deep water effect the physical characteristics of mooring line materials. The configuration and analysis of mooring systems involve nonlinearity due to this fluid-solid coupling, nonlinear hydrodynamic forces, and their effects on stability of motion. In this paper, some pivotal theories and technical questions are presented, including modeling of mooring lines, the theory and method of coupled dynamics analysis on the mooring system, and the development of methodologies for the study of nonlinear dynamics of mooring systems. Further study on mooring systems in deep water are recommended based on current knowledge, particularly dynamic parameters of different materials and cable configuration, interactions between seabed and cable, mechanisms of mooring system response induced by taut/slack mooring cables, discontinuous stiffness due to system materials, mooring construction, and motion instability, etc. Keywords: mooring in the deep water; platform in the deep water; dynamic response; stability of motion CLC number: U674.38Document code: A

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Section: The Tension Caused By Coupled Motion Of Mooring System and Fmentioning

confidence: 99%

Development of study on the dynamic characteristics of deep water mooring system

Tang

Zhang

et al. 2007

J. Marine. Sci. Appl.

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“…Relevant contributions in this field includes the works of Patel and Park (1991), Thampi and Niedzwecki (1992), Han and Benaroya (2000), Park and Jung (2002), Chatjigeorgiou (2004), Yang and Li (2009), Greco et al (2015) and Yang and Xu (2015). Numerical discretization approaches such as the finite element method are typically used to analyze the nonlinear dynamic behavior of offshore structures (Agarwal and Jain, 2003;Yang et al, 2012). However, the computational effort necessary to address the large number of degrees-of-freedom and their couplings is very large (Pesheck et al, 2002;He et al, 2007;Li et al, 2011), precluding the use of finite element programs in parametric analyzes required in an initial design stage.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear vibration modes of an offshore articulated tower

2015

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“…Thiagarajan et al (1998), Bhattacharyya et al (2003), Chen et al (2006), and Low (2010) focused on the nonlinear motion and the hydrodynamics of TLP. Agarwal et al (2003), Koo et al (2004), and Tao et al (2004) investigated the nonlinear motion, coupled effects, and hydrodynamic performance of heave plates for a Spar platform.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic comparison of a semi-submersible, TLP, and Spar: Numerical study in the South China Sea environment

Liu

Yan

et al. 2011

J. Marine. Sci. Appl.

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The South China Sea contains tremendous oil and gas resources in deepwater areas. However, one of the keys for deepwater exploration, the investigation of deepwater floating platforms, is very inadequate. In this paper, the authors studied and compared the hydrodynamics and global motion behaviors of typical deepwater platforms in the South China Sea environment. The hydrodynamic models of three main types of floating platforms, e.g. the Semi-submersible, tension leg platform (TLP), and Truss Spar, which could potentially be utilized in the South China Sea, were established by using the 3-D potential theory. Additionally, some important considerations which significantly influence the hydrodynamics were given. The RAOs in frequency domains as well as global motions in time domains under time-varying wind, random waves, and current in 100-y, 10-y, and 1-y return period environment conditions were predicted, compared, and analyzed. The results indicate that the heave and especially the pitch motion of the TLP are favorable. The heave response of the Truss Spar is perfect and comparable with that of the TLP when the peak period of random waves is low. However, the pitch motion of Truss Spar is extraordinarily larger than that of Semi-submersible and TLP.

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Nonlinear coupled dynamic response of offshore Spar platforms under regular sea waves

Cited by 26 publications

References 9 publications

Development of study on the dynamic characteristics of deep water mooring system

Development of study on the dynamic characteristics of deep water mooring system

Nonlinear vibration modes of an offshore articulated tower

Hydrodynamic comparison of a semi-submersible, TLP, and Spar: Numerical study in the South China Sea environment

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