Seismic response of casing string in deepwater oil and gas well based on theory of Timoshenko beam
HUANG Jin-xiong1,ZHU Xing-ke1,2, HAN Wei-dong1
1.CCCC Sihang Engineering Research Institute Co.,Ltd, Guangzhou 510230, China;2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
Abstract: The soft surface layer has great influence on the stability of subsea casing string in deepwater oil and gas well. Especially, the earthquakes can cause a great bending moment and large shear force on the cross section of casing string. An analytical model for the seismic response of subsea casing string is established on the basis of pile foundation theories and method of reverberation-ray matrix. The casing string is asummed to be a Timoshenko Beam of variable cross section. The bending moments and shear forces of casing string at soft and hard soil cross sections are discussed from the aspect of the shear velocity and thickness of soft surface layer. The results of this work provide reference and guidance for the engineering construction, design and security assessment in practice.
黄锦雄;朱幸科;韩卫东. 基于Timoshenko梁理论的深水油气井套管柱地震响应分析[J]. , 2013, 32(7): 159-164.
HUANG Jin-xiong;ZHU Xing-ke;HAN Wei-dong. Seismic response of casing string in deepwater oil and gas well based on theory of Timoshenko beam. , 2013, 32(7): 159-164.