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Title: Calibration of a dynamic analysis procedure using measurements from a North Sea jack-up in a severe storm

Abstract

Field measurements taken from the Maersk Guardian jackup operating in 75m of water in the North Sea are used to calibrate dynamic analysis procedures. These procedures include wave load modeling, damping, and, most importantly, foundation fixity. The measurements demonstrate the existence of foundation fixity during a large storm event. However, the measurements also indicate some nonlinearity occurring during the storm. This paper describes the measurement program, along with a summary of the data recovered. It continues with a comparison of these measurements to time-domain analytical results. These time-domain analyses are based primarily on procedures specified in the Recommended Practice for Site Specific Assessment of Mobile Jackup Units developed as a joint-industry project. Time-domain analysis was used to study various nonlinear foundation models. The load-shedding model was found to directionally produce the best fit to the measurements. It is concluded that neglecting foundation fixity may be conservative in a dynamic analysis of a jack-up. 12 refs., 13 figs., 1 tab.

Authors:
;
Publication Date:
OSTI Identifier:
160734
Report Number(s):
CONF-950501-
TRN: IM9603%%316
Resource Type:
Conference
Resource Relation:
Conference: 27. offshore technology conference, Houston, TX (United States), 1-4 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of 27. Annual Offshore Technology Conference: 1995 Proceedings. Volume 3: Construction and installation/field drilling and development systems; PB: 591 p.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 02 PETROLEUM; NORTH SEA; OFFSHORE PLATFORMS; WAVE FORCES; FOUNDATIONS; RESPONSE FUNCTIONS; SOIL-STRUCTURE INTERACTIONS; DYNAMIC LOADS; WATER WAVES; WIND LOADS; PETROLEUM INDUSTRY; MATHEMATICAL MODELS

Citation Formats

Weaver, T O, and Brinkmann, C R. Calibration of a dynamic analysis procedure using measurements from a North Sea jack-up in a severe storm. United States: N. p., 1995. Web.
Weaver, T O, & Brinkmann, C R. Calibration of a dynamic analysis procedure using measurements from a North Sea jack-up in a severe storm. United States.
Weaver, T O, and Brinkmann, C R. 1995. "Calibration of a dynamic analysis procedure using measurements from a North Sea jack-up in a severe storm". United States.
@article{osti_160734,
title = {Calibration of a dynamic analysis procedure using measurements from a North Sea jack-up in a severe storm},
author = {Weaver, T O and Brinkmann, C R},
abstractNote = {Field measurements taken from the Maersk Guardian jackup operating in 75m of water in the North Sea are used to calibrate dynamic analysis procedures. These procedures include wave load modeling, damping, and, most importantly, foundation fixity. The measurements demonstrate the existence of foundation fixity during a large storm event. However, the measurements also indicate some nonlinearity occurring during the storm. This paper describes the measurement program, along with a summary of the data recovered. It continues with a comparison of these measurements to time-domain analytical results. These time-domain analyses are based primarily on procedures specified in the Recommended Practice for Site Specific Assessment of Mobile Jackup Units developed as a joint-industry project. Time-domain analysis was used to study various nonlinear foundation models. The load-shedding model was found to directionally produce the best fit to the measurements. It is concluded that neglecting foundation fixity may be conservative in a dynamic analysis of a jack-up. 12 refs., 13 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/160734}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 1995},
month = {Sun Dec 31 00:00:00 EST 1995}
}

Conference:
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