Hysteretic damping of soils for well conductor fatigue analysis |
| |
Affiliation: | 1. Department of Infrastructure Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Victoria 3010, Australia;2. Centre for Offshore Foundation Systems and Ocean Graduate School, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;3. Singular Health Group, West Leederville, WA, 6007, Australia;4. State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Civil Engineering, Tianjin University, China |
| |
Abstract: | The fatigue assessment of a well conductor is a critical design task during offshore exploration and development of hydrocarbons. In recent years, major progress has been made towards the modelling of soil-conductor interaction. Upgraded soil-conductor interaction springs (i.e., p-y curves) and damping models are developed and are gaining acceptance by the industry. However, there is a general lack of simplified procedures to incorporate the soil damping into the time-domain structural analysis of a wellhead system. Thus, the motivation of this paper is to close this gap by proposing a simplified procedure for incorporating the soil damping in the well conductor time domain analysis. The procedure is generic and allows for convenient adoption of alterative p-y spring and damping models. Design charts for equivalent soil system damping ratio versus the lateral deflection of the conductor are developed through parametric analyses based on representative wellhead configurations with typical soil strength profiles in the Gulf of Mexico to facilitate practical design. |
| |
Keywords: | Damping Fatigue Well conductor |
本文献已被 ScienceDirect 等数据库收录! |
|