海底悬跨管道动力响应的试验研究和数值模拟
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摘要
在地震活动区铺设海底管道必须考虑地震荷载的作用。通过在水下振动台模拟海底悬跨管道完成的动力模型试验,根据试验结果分析了管道的悬跨长度、悬跨高度、支撑情况和管内运输不同物质等因素对海底悬跨管道的动力反应的影响。并根据Morison方程建立的海底悬跨管道动力控制方程对试验结果进行了有限元数值模拟,计算结果与试验结果符合得较好。
Seismic loading should be taken into account while constructing submarine pipelines in the seismic active zones. Dynamic model experiments simulating free spanning submarine pipeline were performed on a underwater shaking table. The factors including span, proximity from the seabed, support conditions at pipeline ends and different transmitting materials in the pipe are considered to analyze the dynamic response of the free spanning submarine pipelines based on the experimental results. The dynamic control equation of free spanning submarine pipeline is derived from the Morison equation and numerical analysis is carried out using finite element method. The results are shown to be in good agreement with experimental data.
Seismic loading should be taken into account while constructing submarine pipelines in the seismic active zones. Dynamic model experiments simulating free spanning submarine pipeline were performed on a underwater shaking table. The factors including span, proximity from the seabed, support conditions at pipeline ends and different transmitting materials in the pipe are considered to analyze the dynamic response of the free spanning submarine pipelines based on the experimental results. The dynamic control equation of free spanning submarine pipeline is derived from the Morison equation and numerical analysis is carried out using finite element method. The results are shown to be in good agreement with experimental data.
引文
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[3]T K Datta,E A Mashaly.Transverse response of offshore pipelines to random ground motion[J].EarthquakeEngineering andStructuralDynamics,1990,19(2):217-228.
[4]C Kalliontzis.Numerical simulation of submarine pipelines in dynamic contact with a moving seabed[J].EarthquakeEngineering andStructuralDynamics,1998,27:465-486.
[5]林皋,朱彤,林蓓.结构动力模型试验的相似技巧[J].大连理工大学学报,2000,40(1):1-8.G Lin,T Zhu,P Lin.Similarity technique for dynamic structural model tests[J].Journal ofDalianUniversity ofTechnology,2000,40(1):1-8.(inChinese)
[6]J Zhou,X Li,D X Ma.Seismic response and vibration control for free spanning submarine pipelines[A].Proceedings of the11thInternationalOffshore andPolarEngineeringConference[C].Stavanger,Norway:InternationalSociety ofOffshore andPolarEngineers,2001,2:180-184.
[7]R W Clough,J Penzien.Dynamics of structures[M].McGraw-Hill,Inc.,1975.
[8]Y Tokuo,J H Nath,C E Smith.Wave forces on cylinders near the ocean bottom[J].J.WaterwaysHarbourDiv.ASCE,1974,100:34-50.
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