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首页> 外文会议>25th International Conference on Offshore Mechanics and Arctic Engineering 2006(OMAE2006) vol.4 >COMPARISON OF NUMERICAL RESULTS AND DESIGN CRITERIA FOR BUCKLE PROPAGATION AND BUCKLE ARRESTOR DESIGN
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COMPARISON OF NUMERICAL RESULTS AND DESIGN CRITERIA FOR BUCKLE PROPAGATION AND BUCKLE ARRESTOR DESIGN

机译：扣环传播与扣环避雷器数值结果与设计准则的比较

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摘要

Buckle propagation is a relevant design criterion for deep-water offshore pipelines. Imposed by external impact or local bending, e.g. during laying, a local buckle can be initiated, thereby decreasing the collapse strength of the pipeline. As a result of the high ambient external pressure, the buckle can start to propagate. Several design criteria for buckle propagation exist. This paper compares different design criteria with numerical results to obtain an impression of the levels of conservatism applied in the various codes. In most design cases, it is not suitable to avoid buckle propagation by using an increased wall thickness over the entire pipeline. Therefore, buckle arresters are installed to stop the propagation. The common technical solution is to install sections of thicker pipeline, which requires that the buckle arrestor wall thickness and the length of the buckle arrestor have to be determined during design. A distinction is drawn between short and long buckle arrestors. Both cases are considered here. The design of the buckle arrestor can be carried out by using well-known criteria, such as the criteria developed by Kyriakides, Langner or Torselletti et al. These criteria are compared with experimental data. Numerical calculations are carried out and the results are compared with the design criteria.
机译：扣环传播是深水海上管道的相关设计标准。受外部冲击或局部弯曲的影响，例如在铺设过程中，可能会引发局部弯曲，从而降低管道的塌陷强度。由于高的外部环境压力，带扣可能开始扩散。存在几种用于扣环传播的设计标准。本文将不同的设计标准与数值结果进行比较，以获得对各种规范中应用的保守性水平的印象。在大多数设计情况下，不宜通过在整个管道上使用增加的壁厚来避免翘曲传播。因此，安装了带扣避雷器以阻止传播。常见的技术解决方案是安装较粗的管道，这需要在设计过程中确定带扣避雷器的壁厚和带扣避雷器的长度。短扣式避雷器和长扣式避雷器之间有区别。两种情况都在这里考虑。可以通过使用众所周知的标准，例如由Kyriakides，Langner或Torselletti等人开发的标准，来进行带扣避雷器的设计。将这些标准与实验数据进行比较。进行了数值计算，并将结果与​​设计标准进行了比较。

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