Gravity Platform Tower Vibration

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

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

Research on a Fiber Bragg Grating Strain Sensor for Tower Vibration

2014 ◽  
Vol 496-500 ◽  
pp. 1373-1375
Author(s):  
Jin Feng Geng ◽  
Hong Sheng Cai ◽  
Yong Tao Wei ◽  
Xiao Huan Shen ◽  
Jun Wei Dong
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Compensation ◽  
Strain Sensor ◽  
Compensation Method ◽  
Bragg Grating ◽  
Encapsulation Process ◽  
Tower Vibration

In order to monitor the key parts strain of tower vibration, design a fiber Bragg grating strain sensor, and introduce its structure, encapsulation process and temperature compensation method.

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
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