High-Order Lateral Buckling Analysis of Submarine Pipeline Under Thermal Stress  

作　　者：郭林坪 刘润 

机构地区：[1]School of Civil Engineering,Tianjin University

出　　处：《Transactions of Tianjin University》2012年第6期411-418,共8页天津大学学报（英文版）

基　　金：Supported by Innovative Research Groups of the National Natural Science Foundation of China(No.51021004);National Natural Science Foundation of China(No.40776055);Program for New Century Excellent Talents in University(NCET-11-0370);State Key Laboratory of Ocean Engineering Foundation(1002)

摘　　要：It is of importance to study and predict the possible buckling of submarine pipeline under thermal stress in pipeline design.Since soil resistance is not strong enough to restrain the large deformation of pipeline,high-order buckling modes occur very easily.Analytical solutions to high-order buckling modes were obtained in this paper.The relationships between buckling temperature and the amplitude or the wavelength of buckling modes were established.Analytical solutions were obtained to predict the occurrence and consequence of in-service buckling of a heated pipeline in an oil field.The effects of temperature difference and properties of subsoil on buckling modes were investigated.The results show that buckling will occur once temperature difference exceeds safe temperature;high-order pipeline buckling occurs very easily;the larger the friction coefficients are,the safer the submarine pipeline will be.It is of importance to study and predict the possible buckling of submarine pipeline under thermal stress in pipeline design. Since soil resistance is not strong enough to restrain the large deformation of pipeline, high-order buckling modes occur very easily. Analytical solutions to high-order buckling modes were obtained in this paper. The relationships between buckling temperature and the amplitude or the wavelength of buckling modes were established. Analytical solutions were obtained to predict the occurrence and consequence of in-service buckling of a heated pipe- line in an oil field. The effects of temperature difference and properties of subsoil on buckling modes were investigated. The results show that buckling will occur once temperature difference exceeds safe temperature; high-order pipeline buckling occurs very easily; the larger the friction coefficients are, the safer the submarine pipeline will be.

关 键 词：unburied submarine pipeline lateral buckling analytical solution high-order mode thermal stress 

分 类 号：TE973[石油与天然气工程—石油机械设备]