Abstract
This paper describes the development and implementation of a typical variable amplitude load sequence on tethers for a tension leg platform. The dynamic response of the Hutton TLP was considered in defining a suitable tether tension response spectrum. This spectrum was then used to generate a time series to give a similar amplitude-frequency distribution. Two full scale variable amplitude fatigue tests on large diameter threaded connections are reported using the simulated load sequence. The fatigue test results are compared with constant amplitude results from a previous study on similar connections. A hybrid electric analogue-finite element technique was used to determine the local stress at the critically loaded tooth from which all failures were initiated. Fracture mechanics analysis of the critical cracks was conducted using a recently developed generic weight function solution for threaded connections. Crack aspect ratio was also considered together with previous related studies. In all, the paper presents useful fatigue crack growth data and analysis of threaded tether connections under realistic simulated service loading.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the International Offshore and Polar Engineering Conference |
| Pages | 91-97 |
| Number of pages | 7 |
| Volume | 1 |
| Publication status | Published - 1 Jan 1994 |
| Event | Proceedings of the 4th International Offshore and Polar Engineering Conference. Part 1 (of 4) - Osaka, Jpn Duration: 10 Apr 1994 → 15 Apr 1994 |
Conference
| Conference | Proceedings of the 4th International Offshore and Polar Engineering Conference. Part 1 (of 4) |
|---|---|
| City | Osaka, Jpn |
| Period | 10/04/94 → 15/04/94 |
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Keywords
- crack propagation
- degrees of freedom (mechanics)
- dynamic response
- fatigue of materials
- fatigue testing
- finite element method
- fracture mechanics
- loads (forces)
- mooring cables
- offshore structures
- spectrum analysis
- structural analysis
- crack aspect ratio
- tension buoyant platform
- tension leg platform
Cite this
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Fatigue of threaded tension leg platform tethers. / Brennan, F. P.; Dover, W. D.
Proceedings of the International Offshore and Polar Engineering Conference. Vol. 1 1994. p. 91-97.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Fatigue of threaded tension leg platform tethers
AU - Brennan, F. P.
AU - Dover, W. D.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - This paper describes the development and implementation of a typical variable amplitude load sequence on tethers for a tension leg platform. The dynamic response of the Hutton TLP was considered in defining a suitable tether tension response spectrum. This spectrum was then used to generate a time series to give a similar amplitude-frequency distribution. Two full scale variable amplitude fatigue tests on large diameter threaded connections are reported using the simulated load sequence. The fatigue test results are compared with constant amplitude results from a previous study on similar connections. A hybrid electric analogue-finite element technique was used to determine the local stress at the critically loaded tooth from which all failures were initiated. Fracture mechanics analysis of the critical cracks was conducted using a recently developed generic weight function solution for threaded connections. Crack aspect ratio was also considered together with previous related studies. In all, the paper presents useful fatigue crack growth data and analysis of threaded tether connections under realistic simulated service loading.
AB - This paper describes the development and implementation of a typical variable amplitude load sequence on tethers for a tension leg platform. The dynamic response of the Hutton TLP was considered in defining a suitable tether tension response spectrum. This spectrum was then used to generate a time series to give a similar amplitude-frequency distribution. Two full scale variable amplitude fatigue tests on large diameter threaded connections are reported using the simulated load sequence. The fatigue test results are compared with constant amplitude results from a previous study on similar connections. A hybrid electric analogue-finite element technique was used to determine the local stress at the critically loaded tooth from which all failures were initiated. Fracture mechanics analysis of the critical cracks was conducted using a recently developed generic weight function solution for threaded connections. Crack aspect ratio was also considered together with previous related studies. In all, the paper presents useful fatigue crack growth data and analysis of threaded tether connections under realistic simulated service loading.
KW - crack propagation
KW - degrees of freedom (mechanics)
KW - dynamic response
KW - fatigue of materials
KW - fatigue testing
KW - finite element method
KW - fracture mechanics
KW - loads (forces)
KW - mooring cables
KW - offshore structures
KW - spectrum analysis
KW - structural analysis
KW - crack aspect ratio
KW - tension buoyant platform
KW - tension leg platform
UR - http://www.scopus.com/inward/record.url?scp=0028202331&partnerID=8YFLogxK
M3 - Conference contribution book
SN - 1880653117
VL - 1
SP - 91
EP - 97
BT - Proceedings of the International Offshore and Polar Engineering Conference
ER -