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本文运用边界元来处理管道与海底的接触问题,按连续梁矩阵解法求得管道在跨越海底深沟及岩土高丘时的应力分布。文中运用无量纲参数以图表形式给出由于铺设海底管道时因跨越各种宽度的深沟及不同高度的高丘时的应力情况,可作为海底管道初步设计时的依据。用边界元来处理接触问题,所编计算机程序简便,接触界面的位置由程序在迭代求解中自动确定,可以获得高精度的结果。
In this paper, the boundary element is used to deal with the contact problem between pipeline and the seafloor. The stress distribution of the pipeline when it crosses deep sea trench and geotechnical heights is obtained by the continuous beam matrix method. In the paper, dimensionless parameters are used to give the chart as the basis for the preliminary design of submarine pipeline due to the stress situation when the submarine pipeline is laid because it crosses the deep groove with various widths and the high hills with different height. Using the boundary element to deal with the contact problem, the programmed computer program is simple and the position of the contact interface is automatically determined by the program in the iterative solution, which can obtain high-precision results.