... of the floating bridge. Instead of installing a fixed mooring cable, springs are used to conveniently control the pretension in a scaled down model. A response amplitude operator analysis is conducted, and the results confirm the suitability of the experimental setup in analyzing the dynamic behavior of floating...

... heave decay test floater response amplitude operator renewable energy compartment subsea system displacement natural period simulation mooring system rigid body model turbine multibody model Multibody Modelling of Floating Offshore Wind Turbine Foundation for Global Loads Analysis Lucie...

... heave shallow water lingzhi xiong 1 barge wei zhang 2 different water depth water depth response amplitude operator subsea system upstream oil & gas floatover barge rao experimental investigation global response guang yang 2 natural period midstream oil & gas Experimental...

... Abstract A nonlinear response amplitude operator (NRAO) that is able to model a wide class of nonlinear systems and structures, usually found in maritime and offshore applications, is developed. Its functional scheme is of the Volterra-series type and its order is explicitly dictated from...

... wire rope offshore wind tower water depth site support structure sstlwt conceptual design seafloor ballast wind energy pretension tether subsea system installation renewable energy central column natural period configuration upstream oil & gas response amplitude operator mooring...

...). The dominant response frequencies identified from the amplitude spectrum are presented for the different forcing frequency. The shallow water sloshing profile of the response amplitude operator is also obtained in a wide range of frequencies. The resonant frequency is shifted to a higher value than predicted...

... ABSTRACT This paper examines the consistency between response amplitude operators (RAOs) computed using a linear frequency-domain tool to RAOs derived from time-domain computations based on white-noise wave excitation using FAST, a nonlinear aero-hydro-servo-elastic tool. The RAO comparison...

... constant mooring system pitch surge heave line 1 sensor wave frequency subsea system inertia wave tank response amplitude operator attitude gravity offshore platform frequency accel resonant frequency platform upstream oil & gas fairlead location wind turbine pitch resonant frequency...

... arrived at. Overall results show satisfactory agreement between model tests and theoretical analysis. KEY WORDS: Float-over barge; Response Amplitude Operators; Model Tests; Theoretical Analysis INTRODUCTION Float-over installation method is known as a novel method to install topsides or production decks...

... referring to the centre of gravity are presented in Figs. 16, 17, 20 and 21. The following Figs. present the response amplitude operators (RAO) of heave and pitch motions, i.e. )( k s HsH aj aj j an an n == (6) sa is the amplitude of motion, a the wave amplitude and k the wave number ( a k is the wave...

...] Design SMART Fig. 5 Mooring System Simulation, Design vs. Actual Environmental Conditions The platform was tested for the Gulf of Mexico environment. Several regular and random waves were calibrated for this test program. Regular waves were used to determine the Response Amplitude Operators (RAOs...

... response amplitude operators are also calculated with WAMIT, a program system for zero-speed problems. The resulting response spectra, e.g. the splitting forces, are then transformed into time-domain, using Fourier transformation. For validation, the selected sea con- dition is generated in a physical wave...

... of the project, a methodology for hydroelastic simulation has been developed for a Very Large Floating Structure (VLFS) in short crested irregular waves to predict its behavior and check the relevant airport functions. Some RAOs (Response Amplitude Operators) of motions at ILS positions were calculated first...

... of selected response amplitude operators of forces and motions. The applications presented below utilize results ob- tained by the well established 3D-diffraction-radiation software package WAMIT®l(Newman and Sclavounos, 1988). The pro- gram is based on linear potential theory and neglects viscous ef- fects...

... and experimental DDG 51 seakeeping: heave if3 and pitch G response amplitude operators for Fn = 0.19 and 0.28. 410 1.4 ~3/A 1.2 1 0.8 0.6 0.4 0.2 O' 0.5 t . / n=0.34 . . . . , ~-A ~- -iA TiDOM JONSWAP . . . . Transient Test i i i I I t i ~ I i i i f l i i i i I i i i i I 1 1.5 2 2.5 3 ~11. 1.2 1 0.8 0.6 0.4 0.2...

...; the effect of instantaneous position of the tower; and the surge motion of the tanker transferred to the tower. The random time history of the oil tanker is derived with the help of it's Response Amplitude Operator and the specified sea surface elevation spectrum. The analysis is carried out by an iterative...

.... This paper presents a study of fatigue phemomena for double hull VLCC through sea keeping analysis and finite element analysis. Keywords : Spectral analysis method, Simplified Analysis Method, Response amplitude operator(RAO), Heading angle, Seakeeping analysis, Damage ratio. 1. Introduction Fatigue fracture...

... wave force surge motion tendon load configuration tendon domain analysis diffraction effect platform calculation procedure contribution frequency tension leg platform vector artificial intelligence matrix equation response amplitude operator ABSTRACT The present...