Evaluation of Semisubmersible Motion Characteristics

1986 ◽  
Vol 23 (03) ◽  
pp. 217-225
Author(s):  
Sobhan Sengupta ◽  
M.K. Chatterjee
Keyword(s):  
Experimental Data ◽  
Analytical Method ◽  
Cost Effective ◽  
Design Consideration ◽  
Deepwater Drilling ◽  
Simple Analytical Method ◽  
Motion Characteristics ◽  
Improved Design ◽  
Effective Design ◽  
Platform Motions

Semisubmersibles are the most widely used offshore mobile units for deepwater drilling. Because of their improved motion characteristics they provide a more stable drilling platform. This feature of improved motion characteristics has become an important cost-effective design consideration as larger and more expensive drilling units are needed for deeper water and harsher environments. This paper presents a simple analytical method to compute semisubmersible motion characteristics. Programmed in a microcomputer, this becomes an important tool for designers to identify the important parameters affecting the platform motions, to study their effects, and then to choose desirable values of these parameters for improved design. The program is verified with experimental data, and example applications are given.

scholarly journals Simple analytical method for determining electrical resistivity and sheet resistance using the van der Pauw procedure

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
F. S. Oliveira ◽  
R. B. Cipriano ◽  
F. T. da Silva ◽  
E. C. Romão ◽  
C. A. M. dos Santos
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Sheet Resistance ◽  
Analytical Method ◽  
Numerical Solutions ◽  
Universal Behavior ◽  
Simple Analytical Method ◽  
Van Der Pauw ◽  
Arbitrary Shapes

Abstract This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The method is compared with previous numerical solutions and available experimental data showing a universal behavior for isotropic conductors. An approximated solution is also reported allowing one to easily determine ρ and RS for samples either with regular or arbitrary shapes.

Price structures for electricity supply and potential consequences for building services systems

2021 ◽  
pp. 014362442199081
Author(s):  
Roger Hitchin
Keyword(s):  
Cost Effective ◽  
Building Design ◽  
Electricity Supply ◽  
Cooling Systems ◽  
Price Structure ◽  
Heating And Cooling ◽  
Future System ◽  
The Cost ◽  
Supply Systems ◽  
Effective Design

Policies to reduce carbon emissions are leading to substantial changes in the demand for electricity and to the structure of electricity supply systems, which will alter the cost structure of electricity supply. This can be expected to result in corresponding changes to the price structure faced by customers. This note is an initial exploration of how possible new price structures may impact on HVAC system and building design and use. Changes in the price structure of electricity supply (separately from changes in price levels) can significantly affect the cost-effective design and operation of building services systems; especially of heating and cooling systems. The nature and implications of these changes can have important implications for future system design and operation.

Motion Characteristics of Composite-Type Sea Cage under Pure Wave

2012 ◽  
Vol 490-495 ◽  
pp. 3405-3409
Author(s):  
Chun Liu Li ◽  
Yun Peng Zhao
Keyword(s):  
Experimental Data ◽  
Wave Height ◽  
Vertical Motion ◽  
Data Acquisition System ◽  
Horizontal Motion ◽  
Wave Condition ◽  
Composite Type ◽  
Motion Range ◽  
Motion Characteristics ◽  
Sea Cage

To study motion range changes with wave condition and motion relationship between cages, physical model experiments were carried out. The authors designed 2 models of composite-type sea cages. Experimental data obtained by the CCD data acquisition system. The experiment results showed that 1.in the same period, horizontal motion range,vertical motion range and inclination changes of float collar increase with wave height; 2.In the same wave height, horizontal motion range of the float collar increases with period; 3.The laws between vertical motion and period are not obvious 4.The laws between inclination changes and period are not obvious 5.Motion range of the first cage along the direction of waves is less than other cages.

Polymorphic Control for Cost-Effective Design of Optical Networks

2000 ◽  
Vol 11 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Qiao Chunming ◽  
Mei Yousong ◽  
Yoo Myungsik ◽  
Zhang Xijun
Keyword(s):  
Optical Networks ◽  
Cost Effective ◽  
Effective Design
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