Application of response surfaces for reliability analysis of marine structures

Bernt J. Leira, Holmås, Tore and Kjell Herfjord

Reliability Engineering and System Safety, 2005, vol. 90, issue 2, 131-139

Abstract: Marine structures subjected to multiple environmental loads (i.e. waves, current, wind) are considered. These loads are characterized by a set of corresponding parameters. The structural fatigue damage and long-term response are expressed in terms of these environmental parameters based on application of polynomial response surfaces. For both types of analysis, an integration across the range of variation for all the environmental parameters is required. The location of the intervals which give rise to the dominant contribution for these integrals depends on the relative magnitude of the coefficients defining the polynomials. The required degree of numerical subdivision in order to obtain accurate results is also of interest. These issues are studied on a non-dimensional form. The loss of accuracy which results when applying response surfaces of too low order is also investigated. Response surfaces with cut-off limits at specific lower-bound values for the environmental parameters are further investigated.

Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:90:y:2005:i:2:p:131-139

DOI: 10.1016/j.ress.2005.01.013

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