Used Isolation System to Reduce the Response of Offshore Structure Considering Soil Structure Interaction

IF 1.1 Q3 ENGINEERING, CIVIL Civil and Environmental Engineering Pub Date : 2023-12-01 DOI:10.2478/cee-2023-0060
A. Hasan, Yahya Mohammad Younus
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Abstract

Abstract Fixed offshore platforms are structures of steel or concrete located in the middle of the sea used to export oil, trade, or military. These are designed to withstand all types of weather and dynamic loads. The response was very high under applied these loads. This paper includes a proposal to apply a new isolation system to be placed in different places on the offshore platform to reduce vibrations from high water waves. Three cases that be used, fixed-based (column connect directly to the pile), isolation system in the pile head (isolation between column and pile), and isolation system in the pile head and the middle of columns. The dynamic movements in waves were simulated using ABAQUS programs. More accurate elements and real material properties were used to bring the results closer to reality. The Computational Fluid Dynamics (CFD) method was used to study the effect of water-structure interaction and soil-structure interaction. The results show that the use of the isolation system at the base of the offshore platform has a very significant effect on decreasing the response of the platform to the loads placed on it. Where the isolation system works as a hinge at the pile head and is not allowed to move and rotate for the pile, also the moments are zero. As for the shear force, it is the least that can be compared with the other cases.
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考虑到土壤结构相互作用,使用隔离系统降低近海结构的响应
摘要 固定式海上平台是位于海中央的钢结构或混凝土结构,用于出口石油、贸易或军事。其设计可承受各种天气和动态载荷。在这些载荷作用下的响应非常高。本文建议在近海平台的不同位置安装新的隔离系统,以减少高水浪带来的振动。采用了三种情况:固定式(支柱直接与桩连接)、桩头隔离系统(支柱与桩之间的隔离)以及桩头和支柱中间的隔离系统。波浪中的动态运动使用 ABAQUS 程序进行模拟。为使结果更接近实际,使用了更精确的元素和真实的材料属性。计算流体动力学(CFD)方法用于研究水-结构相互作用和土-结构相互作用的影响。结果表明,在海上平台底部使用隔离系统对降低平台对所受载荷的响应有非常显著的作用。当隔离系统在桩头起铰链作用,不允许桩移动和旋转时,力矩也为零。至于剪力,与其他情况相比是最小的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.00
自引率
58.30%
发文量
69
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