An Analytical Method for Jack-Up Riser's Fatigue Life Estimation. (10th May 2018)

• Record Type: Journal Article
• Authors: Wang, Fengde; Xiao, Wensheng; Liu, Qi; Wu, Lei; Meng, Zhanbin
• Other Names: Pellicano Francesco Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2018(2018)
• Publication Date: 2018-05-10
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2018/5843525
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : In order to determine whether a special sea area and its sea state are available for the jack-up riser with surface blowout preventers, an analytical method is presented to estimate the jack-up riser's wave loading fatigue life in this study. In addition, an approximate formula is derived to compute the random wave force spectrum of the small-scale structures. The results show that the response of jack-up riser is a narrow band random vibration. The infinite water depth dispersion relation between wavenumber and wave frequency can be used to calculate the wave force spectrum of small-scale structures. The riser's response mainly consists of the additional displacement response. The fatigue life obtained by the formula proposed by Steinberg is less than that of the Bendat method.