面向深水S型管道铺设的监测方法研究

发布时间：2018-06-03 16:08

本文选题：S型管道铺设 + 失效分析　；参考：《大连理工大学》2015年硕士论文

【摘要】：S-Lay型铺设由于稳定性好、铺设效率高、适应范围广,逐步成为了海洋管道铺设的发展趋势。然而,由于荷载模型的适用性存疑,复杂力学问题的数值求解困难,以及模型试验受复杂荷载难于模拟和比尺效应制约等问题的存在,使得管道与托管架在铺设过程中仍存在着失效隐患。为了针对铺设海域的荷载特征,验证设计选用荷载模型的合理性,开展管道与托管架的响应的原型测量,验证其设计指标并对铺设期间结构的安全进行评价,本文发展了面向深水S型管道铺设的原型监测方案。主要研究内容在于：依据现有海洋荷载模型与管道和托管架结构的失效模式,总结并提出了适用于现场监测的原型信息。尤其是针对铺设期间管道的状态参量与力学参量难于直接测量的难点,提出了通过对托管架、张紧器等结构的铺设状态参数的测量,间接获取管道状态参数与力学参量的原型测量方案。针对托管架节点过多难以逐一展开测量的特点,结合托管架整体与局部数值分析,拟定了应变测量的热点位置与方案。结合实际环境与作业条件,确定了测量设备与布点位置,构建了完整的现场监测方案,通过现场与室内试验验证了本文拟定监测方案的有效性与可行性。算例分析结果显示出监测方案可以良好的保证下弯段内力测量方案的正确性。拟定出面向结构主要失效形式的安全评价方案,设计了面向现场监测的集成系统,通过监测系统可实现在管道S型铺设期间对结构的安全行为的实时评价。
[Abstract]:Due to its good stability, high laying efficiency and wide adaptability, S-Lay type laying has gradually become the development trend of offshore pipeline laying. However, because the applicability of the load model is doubtful, the numerical solution of the complex mechanics problem is difficult, and the model test is restricted by the complex load and the scale effect. The pipeline and the trusteeship still have hidden trouble in the course of laying. In order to verify the rationality of the load model used in the design according to the load characteristics of the laying area, the prototype measurement of the response of the pipeline and the pedestal frame is carried out, the design index is verified and the safety of the structure during the laying period is evaluated. A prototype monitoring scheme for S-type pipeline laying in deep water is developed in this paper. The main research contents are as follows: according to the existing ocean load model and the failure mode of pipeline and frame structure, the prototype information suitable for field monitoring is summarized and put forward. Especially in view of the difficult point that it is difficult to directly measure the state parameters and mechanical parameters of pipeline during laying, the paper puts forward the measurement of laying state parameters of the structure, such as the tube frame, tensioner, etc. The prototype measurement scheme of pipeline state parameters and mechanical parameters is obtained indirectly. In view of the fact that too many nodes of the trusteeship frame are difficult to be measured one by one, the hot spot and scheme of strain measurement are proposed by combining with the integral and local numerical analysis of the frame. Combined with the actual environment and operation conditions, the location of measuring equipment and points is determined, and a complete field monitoring scheme is constructed. The effectiveness and feasibility of the monitoring scheme are verified by field and indoor tests. The results of numerical examples show that the monitoring scheme can guarantee the correctness of the internal force measurement scheme. A safety evaluation scheme for the main failure forms of the structure is proposed and an integrated system for on-site monitoring is designed. The real-time evaluation of the safety behavior of the structure during the S-type pipeline laying can be realized by the monitoring system.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P756.2;TP274

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