深海钢悬链立管Hill不稳定性预测

摘要/Abstract

摘要：

基于双频激励预测深海钢悬链立管（SCR）Hill不稳定性，即参量共振问题.根据Vandiver理论，将SCR等效转化为顶张力立管（TTR），以多频叠加函数模拟真实外激励，基于多频激励动力学方程得到Hill方程.分析基于多频激励的特殊情形，即双频激励预测系统参量稳定性特性，并以此评估工程中SCR的Hill不稳定性.结果表明：多频激励更能准确预测实际外激励，其预测是探究SCR参量稳定性的关键，相应激励函数的选取决定SCR的设计安全.

关键词: 钢悬链立管, 双频激励, Hill不稳定性, 阻尼, 轴向张力波动

Abstract:

Hill stability of deep-sea steel catenary riser (SCR) was predicted based on bi-frequency excitation. The SCR was transferred into top tensioned riser (TTR) based on Vandiver theory, the multi-frequency signal is proposed to simulate the stochastic tension fluctuation, and Hill equation was obtained according to the dynamic motion equation of TTR under multi-frequency excitation. The parametric stability characteristic of the SCR system under bi-frequency excitation, a typical case of multi-frequency, was primarily discussed, and bi-frequency excitation was used for practical engineering analysis. The results show that multi-frequency excitation can better predict real sea condition than single frequency, the prediction of real external excitation is vital to the parametric stability prediction of SCR, and the riser safety design requirements are determined by the corresponding form of excitation function chosen.

Key words: steel catenary riser(SCR), bi-frequency excitation, Hill instability, damping, fluctuation of axial tension

中图分类号:

P 751

肖飞，杨和振. 深海钢悬链立管Hill不稳定性预测[J]. 上海交通大学学报（自然版）, 2014, 48(04): 583-588.

XIAO Fei,YANG Hezhen. Hill Stability Prediction of Deep-Sea Steel Catenary Riser[J]. Journal of Shanghai Jiaotong University, 2014, 48(04): 583-588.

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