代云云,周晶,李志刚

• 1:扬州大学建筑科学与工程学院
• 2:大连理工大学海岸与近海工程国家重点实验室

摘要(Abstract)：

触地段(Touchdown zone, TDZ)是在役钢悬链线立管(Steel catenary riser, SCR)的关键部位,在复杂载荷作用下,极易形成损伤缺陷,其载荷寿命的评估是深海结构工程中的一个关键问题。本文以大型有限元软件ABAQUS为平台,运用损伤管道实体单元与土弹簧阻尼单元相互作用的模型模拟触地段损伤海底管道在复杂载荷作用下的动力响应,数值计算考虑了管-土相互作用过程中的材料非线性、几何非线性以及接触非线性。讨论了单一环向体积损伤位于触地段管道的不同位置时,触地段损伤管道在不同载荷作用下的动力特性及特征点的动力响应。结果表明,管道所受内外压力以及管道提升端的竖向位移载荷会影响结构的自振频率;体积损伤部位的动力响应较完好部位更剧烈;体积损伤的位置和动力载荷频率对管道动力放大系数的影响很大;当动力载荷的激励频率越接近结构基频时,损伤管道的动力响应及动力放大系数越大。

关键词(KeyWords)： 钢悬链线立管;触地段;体积损伤;动力特性;动力响应;动力放大系数

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划“深海工程结构的极端环境作用与全寿命服役安全项目”(2011CB013702)资助~~

作者(Author): 代云云,周晶,李志刚

DOI: 10.16441/j.cnki.hdxb.20170178

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