Yang, H. and Wang, A. (2013) Dynamic stability analysis of pipeline based on reliability using surrogate model. Journal of Marine Engineering and Technology, 12(2), pp. 75-84. (doi: 10.1080/20464177.2013.11020279)
Full text not currently available from Enlighten.
Abstract
The surrogate model is applied to a reliability analysis of the stability of untrenched pipelines. Experience has shown that the stability of a pipeline is sensitive to a number of variables associated with soil properties, structural modelling, and hydrodynamic loads. Because uncertainties are unavoidable in these key design parameters, it is vital to evaluate pipeline instability failure using a probabilistic approach. However, a reliability analysis of on-bottom stability in the time domain is often a very computationally expensive process. The stability of a pipeline exposed to time-varying environmental loads is a highly nonlinear phenomenon with pipe-soil-fluid interactions. In this work, surrogate model technology was utilised to realise the reliability analysis which is also quite time consuming. A Fourier model was used to calculate the hydrodynamic forces acting on a pipeline. The surrogate model was constructed using experiment sampling and, in conjunction with a Monte Carlo simulation, was employed to perform the reliability evaluation. Moreover, the influences of various random variables on pipeline instability are discussed through a sensitivity analysis. An accurate assessment of the conservatism in the different variables could lead to fewer conservative stabilisation requirements. The results show that using a surrogate model for reliability analysis not only reduces the computational cost significantly but also produces a highly accurate evaluation of pipeline stability.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Yang, Dr Hezhen |
Authors: | Yang, H., and Wang, A. |
College/School: | College of Science and Engineering > School of Engineering > Infrastructure and Environment |
Journal Name: | Journal of Marine Engineering and Technology |
Publisher: | Taylor & Francis (Routledge) |
ISSN: | 2046-4177 |
ISSN (Online): | 2056-8487 |
University Staff: Request a correction | Enlighten Editors: Update this record