Abstract

The purpose of this study was to investigate the seismic behavior of near vertical risers, specifically top-tensioned risers (TTR) for deep water field development. This paper developed a simplified dynamic model of TTR and conducted seismic analysis of the riser under extreme level of historical recorded earthquake excitations. The dynamic responses of the riser under the earthquake excitations were analyzed in terms of displacement and stress. The modal analysis of the riser was conducted and its modal frequencies were studied against the frequency range of earthquake waves to find correlations.

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