基于ABAQUS的合成纤维缆动刚度特性分析
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天津大学

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XXX

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国家自然科学基金资助项目(51509185)


Dynamic stiffness analysis of synthetic fiber mooring line based on ABAQUS
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Tianjin University

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    摘要:

    基于ABAQUS的AQUA模块,分析了外激励作用下合成纤维缆的动力特性。使用ABAQUS中UMAT子程序模拟了缆索的动刚度特性。以水深为1500m的深水绷紧式系泊系统为研究对象,首先分别对其进行静刚度和动刚度计算,比较了两种情况下缆索张力的变化;传统动刚度认整根缆的张力与刚度相同,分别以缆首端和尾端为研究对象,比较其动张力与动刚度的区别,说明了传统算法计算时存在误差;接着分析了自重对缆索张力和动刚度的影响;分析了海流力对缆索张力和动刚度的影响;最后,分析了外激励幅值和频率变化对缆索张力和动刚度的影响。

    Abstract:

    Based on the AQUA module of ABAQUS, the dynamic characteristics of synthetic fiber mooring line under external excitation were analyzed. The dynamic stiffness characteristics of mooring line were simulated by using the UMAT subroutine in ABAQUS. Taking the mooring system of a spar platform at the depth of 1500 m as an example, the static stiffness and dynamic stiffness of the mooring system were calculated, and the changes of tension in two cases were compared; the traditional method recognizes that the tension and stiffness of the whole line are the same, which reduces the calculation accuracy; taking the head end and tail end of the line as the research object, the difference between the dynamic tension and dynamic stiffness were compared; The influence of cable weight on the tension and dynamic stiffness of mooring line was analyzed, and the influence of current force on cable tension and dynamic stiffness was analyzed; Finally, the effect of this method on dynamic tension and stiffness was analysed.

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历史
  • 收稿日期:2021-01-14
  • 最后修改日期:2021-01-14
  • 录用日期:2021-01-26
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