Non-Linear Dynamic Analysis of Coupled Spar Platform

Jameel, Mohammed; Ahmad, Siti Aqlima; Islam, A. B. M. Saiful; Jumaat, Mohd Zamin

doi:10.3846/13923730.2013.768546

Cited by 19 publications

(3 citation statements)

References 37 publications

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“…This response analysis show that collisions have a significant influence on the behaviour of the lighter and more flexible building especially in longitudinal direction causing generous amplification of the response and lead to extensive permanent deformation due to yielding [17][18][19][20]. Associated with the possibility of seismic vulnerability, automated mitigation of responses is required to be assessed [21][22][23][24][25][26] in construction technology.…”

Section: Introductionmentioning

confidence: 99%

Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures

Jameel

Islam

Hussain

et al. 2013

Lat. Am. j. solids struct.

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Pounding of neighbouring construction of structures due to seismic excitation increases the damage of structural components or even causes collapse of structures. Among the possible building damages, earthquake induced pounding has been commonly observed in several earthquakes. Therefore it is imperative to consider pounding effect for structures. This study aims to understand the response behaviour of adjacent buildings with dissimilar heights under earthquake induced pounding. Effects of different separation distances between structures are also investigated. Nonlinear finite element analysis in time domain has been carried out for pounding of neighbouring structures having varying heights. To show the importance of avoiding pounding in structures the results obtained were compared with model having no pounding phenomena. The results were obtained in the form of storey shear, pounding force, storey drift, point displacement and acceleration. The acceleration at pounding level significantly increases during collision of building. The generated extra pounding force may cause severe damage to structural members of structures. Pounding produces shear at various story levels, which are greater than those obtained from no pounding case. Building with more height suffers greater damage than shorter building when pounding occurs. Increasing gap distance tends to reduce story shear in consistent manner. The results also show that the conventional modelling of building considering only beams and columns underestimates pounding effects. More realistic modelling such as beams, columns and slabs shall be adopted to accurately understand the pounding phenomenon.

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Section: Introductionmentioning

confidence: 99%

Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures

Jameel

Islam

Hussain

et al. 2013

Lat. Am. j. solids struct.

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“…13 Nonlinear dynamic analysis of a spar platform configured as a single fully coupled integrated model in ABAQUS AQUA was performed numerically in time domain. 14 The campaign response of the small oil tanker and the offshore platform in the real sea conditions was analyzed using AQWA software. 15,16 The characteristics of a combination mooring system composed of chain, clump, and elastic cables on the floating body were studied using AQWA.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations on dynamic response performance of a cable laying vessel in complex operating conditions

Peng

Gao

Wang

et al. 2019

Advances in Mechanical Engineering

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An innovative cable laying vessel for the grid connecting project of Zhoushan Island was designed and has been constructed. The stability of the vessel under the complex sea conditions is extremely important to the cable laying operations. Experimental and numerical studies are carried out in this study to investigate the stability performance of the mooring system designed for maintaining the position of the vessel. The experiments were conducted in a wave tank under the scale ratio of 1:49, and the motions in 6 degrees of freedom of the vessel model were measured together with the tension forces of the mooring lines, which can be utilized for the numerical model validation. More environmental hydrodynamic conditions were employed for further study numerically to justify the stability of the vessel under the complex operating conditions.

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“…The equilibrium equations of hull and mooring line/risers/ tendon system were solved simultaneously. Jameel et al (2012Jameel et al ( , 2013 evaluated coupled spar responses considering essential nonlinearities.…”

Section: Introductionmentioning

confidence: 99%

Structural Behaviour of Fully Coupled Spar–mooring System Under Extreme Wave Loading

Islam

Jameel

Ahmad

et al. 2014

Journal of Civil Engineering and Management

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Floating spar platform has been proven to be an economical and efficient type of offshore oil and gas exploration structure in deep and ultra-deep seas. Associated nonlinearities, coupled action, damping effect and extreme sea environments may modify its structural responses. In this study, fully coupled spar-mooring system is modelled integrating mooring lines with the cylindrical spar hull. Rigid beam element simulates large cylindrical spar hull and catenary mooring lines are configured by hybrid beam elements. Nonlinear finite element analysis is performed under extreme wave loading at severe deep sea. Morison's equation has been used to calculate the wave forces. Spar responses and mooring line tensions have been evaluated. Though the maximum mooring line tensions are larger at severe sea-state, it becomes regular after one hour of wave loading. The response time histories in surge, heave, pitch and the maximum mooring tension gradually decreases even after attaining steady state. It is because of damping due to heavier and longer mooring lines in coupled spar-mooring system under deep water conditions. The relatively lesser values of response time histories in surge, heave, pitch and the maximum mooring tension under extreme wave loading shows the suitability of a spar platform for deep water harsh and uncertain environmental conditions. Reference to this paper should be made as follows: Islam, A. B. M. S.; Jameel, M.; Ahmad, S.; Jumaat, M. Z.; Kurian, V. J. 2013. Structural behaviour of fully coupled spar-mooring system under extreme wave loading, Journal of Civil Engineering and Management 19(Supplement 1): S69-S77. http://dx.Mohammed JAMEEL did his PhD at Indian Institute of Technology Delhi (IIT Delhi), India. He has successfully completed various sponsored projects involving nonlinear analysis of TLPs, Spar, FPSO platforms, deep and shallow water mooring lines and Risers. The projects were supported by several government and private funding agencies. Presently he is associated with Department of Civil Engineering, University of Malaya, Malaysia. His research area includes Non-linear Dynamics, Earthquake engineering, Reliability engineering, Offshore structures, Artificial neural network and Nonlinear finite element analysis.

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Non-Linear Dynamic Analysis of Coupled Spar Platform

Cited by 19 publications

References 37 publications

Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures

Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures

Experimental and numerical investigations on dynamic response performance of a cable laying vessel in complex operating conditions

Structural Behaviour of Fully Coupled Spar–mooring System Under Extreme Wave Loading

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