Offshore Structure and Design

2019 ◽  
pp. 15-41
Author(s):  
Shashi Shekhar Prasad Singh ◽  
Jatin R. Agarwal ◽  
Nag Mani
Keyword(s):  
Offshore Structure ◽  
Structure And Design

scholarly journals The Supplementary Education Teacher’s Portfolio: Essence, Functions, Structure and Design Principles

2015 ◽  
Author(s):  
Regina G. Sakhieva ◽  
Larisa V. Majkova ◽  
Marina V. Emelyanova ◽  
Nelli G. Gavrilova ◽  
Evgenia G. Sharonova ◽  
...  
Keyword(s):  
Design Principles ◽  
Supplementary Education ◽  
Structure And Design

Flow distribution analysis by helical scanning in polysulfone hemodialyzers: Effects of fiber structure and design on flow patterns and solute clearances

2006 ◽  
Vol 10 (4) ◽  
pp. 380-388 ◽  
Author(s):  
Claudio RONCO ◽  
Nathan LEVIN ◽  
Alessandra BRENDOLAN ◽  
Federico NALESSO ◽  
Dinna CRUZ ◽  
...  
Keyword(s):  
Flow Distribution ◽  
Flow Patterns ◽  
Distribution Analysis ◽  
Fiber Structure ◽  
Structure And Design

A Parametric Study of Low-Frequency Damping of Mooring System

2014 ◽  
Author(s):  
Minglu Chen ◽  
Shan Huang ◽  
Nigel Baltrop ◽  
Ji Chunyan ◽  
Liangbi Li
Keyword(s):  
Low Frequency ◽  
Structure Design ◽  
The Body ◽  
Body Motion ◽  
Mooring Line ◽  
Offshore Structure ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Line System ◽  
Irregular Wave

Mooring line damping plays an important role to the body motion of moored floating platforms. Meanwhile, it can also make contributions to optimize the mooring line system. Accurate assessment of mooring line damping is thus an essential issue for offshore structure design. However, it is difficult to determine the mooring line damping based on theoretical methods. This study considers the parameters which have impact on mooring-induced damping. In the paper, applying Morison formula to calculate the drag and initial force on the mooring line, its dynamic response is computed in the time domain. The energy dissipation of the mooring line due to the viscosity was used to calculate mooring-induced damping. A mooring line is performed with low-frequency oscillation only, the low-frequency oscillation superimposed with regular and irregular wave-frequency motions. In addition, the influences of current velocity, mooring line pretension and different water depths are taken into account.

A New Spectral Method for Modeling Dynamic Ice Actions

2004 ◽  
Author(s):  
Tuomo Ka¨rna¨ ◽  
Yan Qu ◽  
Walter L. Ku¨hnlein
Keyword(s):  
Dynamic Response ◽  
Spectral Density ◽  
Time Correlation ◽  
General Purpose ◽  
Density Functions ◽  
Offshore Structure ◽  
Spectral Density Functions ◽  
Ice Force ◽  
Ice Forces ◽  
Scale Data

This paper presents a method of evaluating the response of a vertical offshore structure that is subjected to dynamic ice actions. The model concerns a loading scenario where a uniform ice sheet is drifting and crushing against the structure. Full scale data obtained at the lighthouse Norstro¨msgrund is used in the derivation of a method that applies both to narrow and wide structures. A large amount of events with directly measured local forces was used to derive formulas for spectral density functions of the ice force. A non-dimensional formula that was derived for the autospectrum applies for all ice thicknesses. Coherence functions are used to define the cross-spectra of the local ice forces. The two kind of spectral density functions for local forces can be used to evaluate the spectral density of the total ice force. The method takes account of both the spatial and time correlation between the local forces. Accordingly, the model provides a tool to consider the non-simultaneous characteristics of the local ice pressures while assessing the total ice force. The model can be used in conjunction with general purpose FE programs to evaluate the dynamic response of an offshore structure.

A computer-assisted training/monitoring system for TURP structure and design

1999 ◽  
Vol 3 (4) ◽  
pp. 242-251 ◽  
Author(s):  
M.P.S.F. Gomes ◽  
A.R.W. Barrett ◽  
A.G. Timoney ◽  
B.L. Davies
Keyword(s):  
Monitoring System ◽  
Computer Assisted ◽  
Structure And Design
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