海洋立管触地段横向地震动响应的试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (18) : 132-137.

论文

海洋立管触地段横向地震动响应的试验研究

代云云1,2，李志刚1，冯新2，刘帅2,3，郭凌云2，周晶2

作者信息 +

Experimental study on the dynamic response of a marine riser in touchdown zone under lateral earthquake

DAI Yunyun1,2，LI Zhigang1，FENG Xin2，LIU Shuai2,3，GUO Lingyun2，ZHOU Jing2

Author information +

文章历史 +

摘要

建立一套立管与海床相互作用的模型试验系统，开展了管-土作用模型在振动台上的模态试验和地震动试验，得到了管-土作用模型的横向固有频率和相应振型、沿立管触地段以及与其相邻的水平段和悬垂段轴向和环向的一些特征点在地震作用下的地震动响应。试验结果表明：横向地震作用下，立管水平段的应变响应非常小；立管触地段海底管道的应变响应很大，是立管结构最易产生损伤的关键部位；立管悬垂段也表现出较大的应变响应，是立管产生损伤的另一个关键部位；在横向地震作用下立管触地段侧边较正上方和正下方更易产生损伤。模型试验的成果丰富了海洋立管动力模型试验的研究内容，为优化海洋立管抗震设计、评估在役油气管道的抗震安全提供了科学依据。

Abstract

A set of experimental system for riser and seabed interaction was developed by using PVC pipeline and soft clay. Modal test and seismic test of the pipe-soil system on a large-sized shaking table were performed in this paper. The first three order frequencies and correspondent vibration mode shapes transversely were obtained from the modal test. Seismic response of some feature points along pipeline and pipe ring in touchdown zone and the adjacent surface zone and catenary zone was also observed. Results show the strain response of riser in surface zone was very small under lateral seismic excitation. The maximum strain response appeared in the touchdown zone of riser. Strain response of the riser in catenary zone was also severe, being another key part of the riser. In addition, dynamic response in lateral side of the pipeline is more severe than the top and bottom of the riser under lateral seismic excitation. Test results enrich the research on dynamic model test of the marine riser around touchdown zone, providing scientific basis for seismic design and safety assessment of riser in service.

导出引用

代云云1,2，李志刚1，冯新2，刘帅2,3，郭凌云2，周晶2. 海洋立管触地段横向地震动响应的试验研究[J]. 振动与冲击, 2020, 39(18): 132-137

DAI Yunyun1,2，LI Zhigang1，FENG Xin2，LIU Shuai2,3，GUO Lingyun2，ZHOU Jing2. Experimental study on the dynamic response of a marine riser in touchdown zone under lateral earthquake[J]. Journal of Vibration and Shock, 2020, 39(18): 132-137

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