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Indexed by:会议论文

Date of Publication:2016-06-26

Included Journals:EI

Volume:2016-January

Page Number:952-958

Abstract:In this paper, a nonlinear foundation-hull finite element model, which consists of foundation, spudcan, leg and main hull four parts, is proposed for the vibration property analysis of jack-up platform. In this model, nonlinear constitutive relation is used to define the seabed soil foundation, which is modeled as nonlinear solid elements. The spudcan is modeled according to its actual size and scantling in order to take its elasticity into consideration accurately. With a transient analysis approach, the vibration property under surge, sway and yaw motion is acquired, and nonlinear factors such as p-delta effect and fluid resistance damping are taken into account. This numerical model is applied into the vibration analysis of the Santa Fe Magellan jack-up platform. By comparing the numerical result with the measured data, it proves that the proposed method is more accurate than the traditional methods. With this numerical model, the following influence factors on natural frequency of jack-up are analyzed in details, which are different types of foundation, different range of seabed soil foundation in the finite element model and different spudcan diameter. The proposed method and conclusion of this paper could be helpful in both general design and safety analysis for the jack-up platform. © Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).