Concrete Gravity Platform In Shallow Offshore Louisiana Water

1979 ◽  
Author(s):  
William A. DeShazer ◽  
James E. Hunteman ◽  
Frank L. Anastasio
Keyword(s):  
Gravity Platform

The Removal of the Maureen Steel Gravity Platform

1999 ◽  
Author(s):  
P. Broughton ◽  
R.L. Davies ◽  
J. Jenkins
Keyword(s):  
Gravity Platform

scholarly journals Design and Testing of Inertial System for Landslide Displacement Distribution Measurement

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7154
Author(s):  
Yongquan Zhang ◽  
Huiming Tang ◽  
Guiying Lu ◽  
Yuansheng Wang ◽  
Changdong Li ◽  
...  
Keyword(s):  
Pitch Angle ◽  
Measurement Accuracy ◽  
Measurement Instrument ◽  
Deformation Monitoring ◽  
Displacement Measurement ◽  
Roll Angle ◽  
Lateral Direction ◽  
Landslide Evolution ◽  
Gravity Platform ◽  
And Control

Landslide displacement monitoring plays a fundamental role in the study of landslide evolution mechanisms, forecasting, risk assessment, prevention, and control. To fill the deficiencies of traditional instrumentation for measuring landslide displacement distributed along lateral direction, a landslide displacement measurement method based on deformation-coupled pipeline trajectory measurement is proposed, and a pipeline trajectory inertial measurement instrument is developed. The developed instrument, primarily comprised of a single shaft gyro, two axis accelerometers, and an external roller encoder, is designed as an axial half strapdown-radial half platform structure combined with a mechanical gravity platform. This structure avoids the singularity of pitch angle and roll angle and can expediently calculate a pipeline trajectory with an Eulerian transformation when obtaining several basic physical variables, e.g., the axial linear velocity, pitch angle, roll angle, and azimuth angle. Additionally, the pipeline trajectory, measured at different times, possesses the ability to reflect the displacement evolution feature of landslides. The results of prototype simulation tests imply a single measurement accuracy of a 12 cm/100 m span and a singly periodic multiple (more than five times) measurement accuracy of a 3 cm/100 m span, which meets medium-precision displacement measurement requirements for a landslide. Additionally, the finished instrument has been successfully applied to the deformation monitoring of the Majiagou I# landslide, which further verifies its feasibility and offers a reference for similar landslides.

Setdown of a catenary-moored gravity platform

1996 ◽  
Vol 9 (7) ◽  
pp. 721-742 ◽  
Author(s):  
B. Padmanabhan ◽  
R.C. Ertekin
Keyword(s):  
Gravity Platform

Effects of Soil-Structure Interaction on Seismic Response of a Steel Gravity Platform

1979 ◽  
Vol 101 (3) ◽  
pp. 171-181
Author(s):  
A. S. Veletsos ◽  
I. B. Boaz
Keyword(s):  
Seismic Response ◽  
Water Depth ◽  
Soil Structure ◽  
Large Diameter ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Practical Procedure ◽  
Gravity Platform ◽  
Bracing System

After a brief review of the principal effects of soil-structure interaction on the response of structures subjected to earthquakes, a simple practical procedure is presented for evaluating these effects. The procedure is next applied to a study of the response of a proposed 400-ft steel gravity platform in 300-ft water depth, and the results of the study are discussed. The structure investigated consists of three large-diameter legs of tubular construction interconnected by a truss-type bracing system and supported on three circular pads.

Gravity Platform Tower Vibration

1977 ◽  
Author(s):  
Dag N. Jenssen ◽  
Bjorn N. Hjertas ◽  
Jens J. Jensen
Keyword(s):  
Gravity Platform ◽  
Tower Vibration
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