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工程力学  2013 

钢悬链式立管与海床相互作用模拟方法研究

DOI: 10.6052/j.issn.1000-4750.2011.08.0495, PP. 14-18

Keywords: 钢悬链式立管,弹性地基梁,大挠度曲线梁,深水立管,海床土吸力

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Abstract:

基于大挠度曲线梁模型和弹性地基梁理论,研究了钢悬链式立管与海底相互作用的模拟方法。采用大挠度曲线梁模拟钢悬链式立管的悬垂段,采用弹性地基梁模拟海底流线段。钢悬链式立管与海底相互作用模型不仅考虑了弹性支撑反力和摩擦力,还考虑了动态效应的阻尼力和液化土的吸力。分析表明,采用大挠度曲线梁和弹性地基梁模型分析钢悬链式立管,其单元尺寸的影响较小,可采用较大的计算单元,从而缩短计算时间、减少内存。基于该方法的开发程序与商用程序OrcaFlex吻合较好,但对单元长度的敏感性远远小于OrcaFlex。

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