SPH与CEL方法在海底滑坡计算上的对比分析

Comparative analysis of SPH and CEL methods used in submarine landslides

研究表明,海底滑坡大大影响水下生产系统、海底管道和其他海洋结构的稳定性和安全性。即使倾斜角小于1°滑坡也可以发生。目前陆上滑坡的研究较多,但海底滑坡的研究很少。本文比较分析了CEL和SPH方法在海底滑坡上的应用。可以看出,采用SPH方法和CEL方法进行海底滑坡的计算都是可行的。CEL方法在某些方面的结果更为准确。当SPH和CEL的单元数量较少时,SPH的计算时间比CEL短,但是随着单元数量的增加,CEL方法计算速度比较快。如果需要拉格朗日结构的应力值,最好选择CEL方法。

Study shows that the submarine landslides have greatly affect the stability and security of subsea structures.Landslides can also take place even though the slope Angle is less than 1°,At present There are much more studies about onshore landslides,but the study of submarine landslides is very few.This paper discuss the CEL and SPH methods used in submarine landslides,It shows that both methods are feasible for simulation of submarine landslides.The results of CEL method is more accurate.When the elements of SPH and CEL is few,the SPH has shorter-time calculation than CEL's,but with the increasing of elements,the CEL method has short calculation time. If structure's stress is required,the CEL method is a better choice.