关键词: 海底管道, 海上施工, 管道铺设, 管道变形, 管道强度, 施工参数

Abstract: Based on brief analyzing present conditions of submarine pipeline laying and construction, load and deformation of sea-floor section and suspending section for "S" type and "J" type pipeline-laying were srudied comprehensively.The interaction of seafloor section and the sea-bed foundation was analyzed by using Pasternak bouble-parameter-elastic-foundation model, and the higher-order non-linear differential equation considering wave acting on suspending section was resolve by using weighted residual method.Separately utilizing the condition of interaction of blank structure and the pipeline during laying and the continuous condition of the sea-floor section and the suspending section.A proximate resolution of the pipeline's deformation stress and strength were derived, and a computer programme was developed.The curves presenting the relations of the equivalent stress and the pipeline length in different combinations of operating conditions and structral parameters were analysed and recommended for reference in "S" type and "J" type pipeline laying designs.

Key words: submarine pipeline, offshore installation, pipeline paying, pipeline deformation, pipeline strength, operation parameter