Practical modeling for articulated risers and loading columns

Journal Article · Sat Dec 01 04:00:00 EST 1984 · J. Energy Resour. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3231104· OSTI ID:5743340

McNamara, J F; Lane, M

An efficient method for the analysis of the linear and nonlinear static and dynamic motions of offshore systems such as risers and single-leg mooring towers is presented. The technique is based on the finite element approach using convected coordinates for arbitrary large rotations and includes terms due to loads such as buoyancy, gravity, random waves, currents, ship motions and Morison's equation. Practical features include the addition of intermediate articulations and modeling of the loading arm between the riser and associated tanker. Parametric studies are presented to show that stable and accurate results are obtained using relatively large time step increments leading to efficient design studies.

• Research Organization: Univ., College, Galway
• OSTI ID: 5743340
• Journal Information: J. Energy Resour. Technol.; (United States), Journal Name: J. Energy Resour. Technol.; (United States) Vol. 106:4; ISSN JERTD
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DIFFERENTIAL EQUATIONS
DYNAMIC LOADS
EQUATIONS
EQUATIONS OF MOTION
FINITE ELEMENT METHOD
FLOTATION
MARINE RISERS
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
MOTION
NUMERICAL SOLUTION
OFFSHORE PLATFORMS
PARTIAL DIFFERENTIAL EQUATIONS
PIPES
SEPARATION PROCESSES
STATIC LOADS
SUPPORTS
WAVE FORCES