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Offshore Structures?Past, Present, and Future
A review of the evolution of offshore platforms concludes that the process is ongoing. New configurations continue to emerge and the range of applicability continues to expand. Today's...

The Mother of All Resilient Structures: Fixed-Base Tower in 3000-Foot Water and Some Outstanding Issues
This paper describes design and development work for 40- to 80-well fixed- base - yet compliant - towers for 2000- to 3000-foot water depths. Technical issues which are covered include:...

Current Blockage Effects on Model-Scale Offshore Platform
This paper presents analysis results of model tests on a 1:47 scale model of an offshore jacket structure under wave-plus-tow (representing wave-plus-current) conditions. The analysis...

Wave Exciting Forces on a Platform Fixed in Nonlinear Shallow Water Waves
This paper presents the result of an experimental observation of cnoidal waves and the nonlinear wave loads on a fixed barge in a 2-dimensional wave tank. The Ursell numbers of the waves...

Predicting Fate and Effects of Hydrocarbons in the Oceans
Three major sources of hydrocarbons exist in the oceans. One is from oil spills related to the production and transportation of hydrocarbons. The second, while generally not spectacular,...

Wave Effects on Offshore Structures?Some Recent Research
The present paper summarizes methods of estimating wave effects on offshore structures, and highlights a selection of recent related research. Initially, certain aspects relating to the...

Sea Floor Wave-Induced Water Kinematics for Design of Pipeline
A statistical model is presented for horizontal velocity and acceleration of water particles beneath storm seas near the sea floor. An expansion of the kinematics with basis functions...

Probability of Wave Force on Horizontal Members
This study is motivated by the works of Isaacson and Subbiah (1990) to evaluate the vertical wave force on a rigid horizontal member located in the vicinity of still water level with its...

Reliable Design-Wave Force Predictions for Seabed Pipelines
The results of three separate field research projects have been pulled together to provide a design formula for maximum wave-induced horizontal force on a submarine pipe. This broadly-applicable...

Static Wave Force Procedure for Platform Design
Since results from the Ocean Test Structure were presented at Civil Engineering in the Oceans IV in 1979, there have been numerous laboratory experiments and a few full-scale measurements...

Pipeline Storm Behavior on Clay Soils
A series of transverse wave loading tests was conducted on a specially mounted section of pipe in a sediment-filled tank, to investigate the stability of unburied submarine pipelines under...

The SIMBAT Software Package for Stochastic Interpolation of Ocean Wave Kinematics as an Aid in the Engineering Design of Large Floating Structures
Geostatistical techniques of nonconditional and conditional simulation are used in a new public domain computer software package, named SIMBAT, to stochastically interpolate ocean wave...

Recent Wave Kinematics Experimental Studies
Kinematics in the near surface region of water waves have been measured with a laser Doppler anemometer in the laboratory. The major results of these recent wave kinematics measurements...

Spectral and Statistical Characteristics of Wind Waves Off Canary Islands
Wave climate around Canary Islands is studied by means of statistical and spectral techniques. Maximum Entropy Method is used for obtaining the spectral density function. Autocorrelation...

Three-Dimensional Circulation Modeling of the Coastal and Ocean Environments
Incursion of the loop current, a meandering feature of Gulf of Mexico large-scale circulation, may produce large hydrodynamic forces on the offshore structures. The present study is to...

Wave Slamming on a Horizontal Circular Cylinder
The present paper describes an experimental study of the wave slamming force on a horizontal circular cylinder located near the free surface. The vertical force on a cylinder and the corresponding...

Hydraulic Design of Offshore Breakwater in Sergipe, Brazil
A Petrobras (Petroleo Brasileiro S.A.) marine terminal was recently constructed in Sergipe, Brazil (Figure 1). The offshore breakwater was initially designed in a conventional way, but...

Stability of Accropode(R) and Comparison with Parallelepipedic Block
This paper describes the tests which were performed on physical models with irregular waves, to determine the hydraulic stability of the Accropode^(R)...

Experimental Research on Groyne Stability Under Very Oblique Wave Action
Most of the experimental research concerning the stability of coastal structures is focused on normal wave incidence. However, many of these structures are subject to waves which run predominantly...

Use of Manned Submersibles to Investigate Slumps in Deep Water Gulf of Mexico
The Johnson-Sea-Link manned submersible was used to investigate surface slumps in the deep water Gulf of Mexico. High quality and specifically placed seafloor cores, video tapes, 35 mm...

 

 

 

 

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