Fatigue Reliability of TLP Tether Systems

Hovde, G.; Moan, Torgeir

doi:10.1115/1.2829046

Cited by 4 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reliability of TLPs has been extensively investigated and many publications by well known experts in the field can be found in the open literature [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] . The global performance of the early TLP structures (Hutton, Heidrun and Snorre) was investigated [23][24][25][26] under operating conditions and winter storms and concluded to be within design expectations.…”

Section: Reliability Of Tlp Platformsmentioning

confidence: 99%

“…However, non-linear effects are known to cause TLPs to have a non-Gaussian quality to their response as discussed in several references [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] . In other words, the probability of exceeding a given level of response may exceed the values predicted by equations (1) and (2).…”

Section: Tlp Tendon Tensions -Design Approachmentioning

confidence: 99%

See 1 more Smart Citation

Statistics of TLP Tendon Tension Behaviour During Hurricane Lili

Morandi

Martinez

Smith

2004

23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2

View full text Add to dashboard Cite

Hurricane Lili permitted an assessment of the global performance of several deepwater structures under a major environmental event. The US Minerals Management Service (MMS) commissioned American Global Maritime Inc. (AGMI) to collect and assess information on the performance of the deepwater production facilities that were impacted by Lili. The Shell Brutus Tension Leg Platform (TLP) provided comprehensive measurements of winds, motions and tendon tensions during Lili. The tendon tension data recorded was analyzed in both the time and frequency domain and tendon tension statistics were comparable to the relevant design values. Other relevant comparisons included natural period and damping estimates. Overall the design ‘recipe’ adopted for Brutus was sufficient to prevent exceedance of design capacities and damage to the hull structure and tendons during Hurricane Lili. The lessons learned from the analyses and recommendations for further work are also summarized in this paper.

show abstract

Section: Reliability Of Tlp Platformsmentioning

confidence: 99%

Section: Tlp Tendon Tensions -Design Approachmentioning

confidence: 99%

Statistics of TLP Tendon Tension Behaviour During Hurricane Lili

Morandi

Martinez

Smith

2004

23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2

View full text Add to dashboard Cite

show abstract

“…The same procedure was used by Hovde and Moan to predict the fatigue reliability of TLP. Their method accounts for inspections and repairs of the structure [14].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Fatigue Reliability for Jacket-Type Offshore Platforms Considering Dynamic Behavior

Khedmati

Rigo

Amrane

et al. 2013

Volume 2B: Structures, Safety and Reliability

View full text Add to dashboard Cite

In order to traditionally investigate the strength of marine structures, the structure is subjected to a maximum static load. However, the marine structures are usually suffering environmental forces varying with time. Wave forces are the most important time dependent loading that causes fatigue in structural elements and joints. In this paper different methods base on S-N curve and linear elastic failure mechanics are presented. The governing equations and theories that are used in each method are expressed and the application of each method will be discussed. The two main methods of deterministic analyses are: stress-based approach (S-N curve approach) and linear elastic fracture mechanics (LEFM) approaches. These approaches are applicable to different analyzing strategies, ie the first approach is used for cases in which general form of fatigue is dominant, but the latter involves the calculations of reliability as functions of crack geometry and its boundary conditions. The SPD12C jacket platform in South Pars Oil Field is also modeled as a case study and the results of fatigue reliability analysis are presented. In this paper a comprehensive method is presented to accurately predict the reliability of offshore platforms. This method is based on S-N curve and the results are compared with the fatigue life of joints. Due to nonlinear interaction of soil and piles and the other affecting parameters such as flexibility of joints, non Gaussian procedure of loading, and nonlinearity of reaction force, the precise analyzing of stress levels will be impossible and a complex numerical analysis could only give limited information about the statistical properties of stress. In order to perform the fatigue analysis and predicting the cycles of stress SACS was used which is known as a powerful software in designing and analyzing offshore structures [1]. In this paper the whole structure was modeled subjected to different forces such as wave and sea currents. The effects of parameters such as marine growth and interaction of soil and piles are also included. The latter is shown to have a significant effect on determination of fatigue life of the platform.

show abstract

References

2017

Handbook of Structural Life Assessment

View full text Add to dashboard Cite

Fatigue Reliability of TLP Tether Systems

Cited by 4 publications

References 5 publications

Statistics of TLP Tendon Tension Behaviour During Hurricane Lili

Statistics of TLP Tendon Tension Behaviour During Hurricane Lili

Assessment of Fatigue Reliability for Jacket-Type Offshore Platforms Considering Dynamic Behavior

References

Contact Info

Product

Resources

About