深水立管设计标准中内波作用的分析与探讨

Analysis and Discussion on the Effect of Internal Wave in the Design Standard of Marine Risers

深水立管的设计、建造以及安装都必须依据相关规范进行,中国当前尚未出台专门针对立管设计的相关标准,现阶段还是以参考国外规范为主。本文首先对立管设计、安装中涉及的相关规范和工业标准进行介绍,论述当前国外API、ABS和DNV设计规范中关于深水立管环境条件及其载荷的相关规定,然后针对中国南海等海域普遍存在的内波现象,分析了内波尤其是内孤立波对顶张力立管的影响,结果表明,内孤立波会引起立管较大的位移以及较高的应力幅值,需要在设计分析中加以考虑。最后对中国在引入API、ABS和DNV等相关规范设计深水立管时提出相应的建议,以期为南海海域油气开发中立管的设计提供参考。

The design, construction and installation of marine risers must be based on related specifications. While there are no related specifications in China at present and mainly reference for foreign standards. The related codes and industrial standards in the design and installation of marine risers are introduced and the environmental conditions and environmental loads related to deep-sea riser in the code of API, ABS and DNV are introduced. Then the attentive focus is put on the internal wave phenomenon commonly exist in South China Sea and the effect of internal wave especially the internal solitary wave on the top tension riser （TTR） is analyzed. The results indicate that the internal solitary wave may cause extreme response on the riser and should be considered in the design. Finally, the recommended suggestions are proposed when we introduce the codes of API, ABS and DNV and provide reference for the design of deep-sea riser.