浅水区海底埋设管线上非线性波浪力

在设计埋入海底的管线时 ,波浪引起的渗流力是必须考虑的主要环境因素之一 .基于一阶近似椭圆余弦波理论研究了浅水区非线性波浪对海底埋设管线的作用 ,求得了作用于管线上的渗流压力解析解 ,并同线性波浪理论结果进行了比较 .计算结果表明 ,当 L/d较大时 ,非线性结果远较线性结果大 ;当 L/d <8时 ,两者相差不大 .此外 ,土参数 Cs的影响也很显著 ,当 Cs值在单位量级左右时 ,非线性波浪力可达到最大值

Nonlinear wave force on a buried pipeline in shallow water

In the design of offshore pipeline buried in a permeable seabed,the wave induced forces are important factors. This paper studies the nonlinear wave action on a buried pipeline in shallow water areas based on the first order cnoidal wave theory,and presents an analytical solution for the seepage pressure. The results from this solution and those from linear theory are compared. The results show that,when L/d is relatively large,the nonlinear wave forces are much larger than linear ones, and when L/d is less than 8,there is no significant difference between linear wave forces and nonlinear ones. In addition,the effects of parameter C s are significant,and the nonlinear wave force will reach a maximum value when C s value is around unit.