Modeling of Seabed Interaction of Oceanographic Moorings in the Frequency Domain

2005 ◽  
Author(s):  
Seon Han ◽  
Mark Grosenbaugh
Keyword(s):  
Frequency Domain ◽  
Seabed Interaction

Modelling of Seabed Interaction in Frequency Domain Analysis of Mooring Cables

2003 ◽  
Author(s):  
Paul P. A. Ong ◽  
Sergio Pellegrino
Keyword(s):  
Frequency Domain ◽  
Equations Of Motion ◽  
Time Integration ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Wave Loading ◽  
Computational Overhead ◽  
Spring System ◽  
Seabed Interaction ◽  
Domain Integration

Mooring cables under wave loading interact dynamically with the seabed; this interaction is nonlinear and can be modelled in full only by performing lengthy time integration of the equations of motion. However, time domain integration is far too computationally expensive to be carried out for all load cases. A new method of modelling the interaction between a cable and the seabed in the frequency domain, but without considering frictional effects and impact, is therefore proposed. The section of cable interacting with the seabed is truncated and replaced with a system of coupled linear springs, with stiffnesses linearised from static catenary equations. These springs would model the behaviour of the truncated cable and hence the time-varying boundary condition at the touchdown. The entire cable-spring system is then analysed in the frequency domain with a centred finite difference scheme. The proposed method has shown to increase the accuracy of frequency domain analysis in certain cases with affordable computational overhead.

Correction to "The analysis of slug tests in the frequency domain" (WRR 25(11), pp. 2388-2396

1990 ◽  
Vol 26 (8) ◽  
pp. 1863-1863
Author(s):  
Paul Marschall ◽  
Baldur Barczewski
Keyword(s):  
Frequency Domain ◽  
Slug Tests

Methods of calibration of high-resolution optical reflectometers operating in the frequency domain

2018 ◽  
pp. 40-43
Author(s):  
V.V. GRIGORIEV ◽  
◽  
V.E. KRAVTSOV ◽  
A.K. MITUEV ◽  
E.A. MOROZ ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Domain

High Resolution Ultrasound Imaging Using Frequency Domain Interferometry

2012 ◽  
Vol 132 (10) ◽  
pp. 1552-1557 ◽  
Author(s):  
Hirofumi Taki ◽  
Takuya Sakamoto ◽  
Makoto Yamakawa ◽  
Tsuyoshi Shiina ◽  
Toru Sato
Keyword(s):  
High Resolution ◽  
Frequency Domain ◽  
Ultrasound Imaging
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