Energy Transfer Mechanism and Probability Analysis of Submarine Pipe Laterally Impacted by Dropped Objects  

作　　者：梁静 余建星 余杨 W.Lam 赵羿羽 段晶辉 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University

出　　处：《China Ocean Engineering》2016年第3期319-328,共10页中国海洋工程（英文版）

基　　金：financially supported by the Major State Basic Research Development Program of China(973 Program,Grant No.2014CB046804);the National Natural Science Foundation of China(Grant Nos.51239008 and 51309178);the National Science and Technology Major Project(Grant No.2011ZX05030-006)

摘　　要：Energy transfer ratio is the basic-factor affecting the level of pipe damage during the impact between dropped object and submarine pipe. For the purpose of studying energy transfer and damage mechanism of submarine pipe impacted by dropped objects, series of experiments are designed and carried out. The effective yield strength is deduced to make the quasi-static analysis more reliable, and the normal distribution of energy transfer ratio caused by lateral impact on pipes is presented by statistic analysis of experimental results based on the effective yield strength, which provides experimental and theoretical basis for the risk analysis of submarine pipe system impacted by dropped objects. Failure strains of pipe material are confirmed by comparing experimental results with finite element simulation. In addition, impact contact area and impact time are proved to be the major influence factors of energy transfer by sensitivity analysis of the finite element simulation.Energy transfer ratio is the basic-factor affecting the level of pipe damage during the impact between dropped object and submarine pipe. For the purpose of studying energy transfer and damage mechanism of submarine pipe impacted by dropped objects, series of experiments are designed and carried out. The effective yield strength is deduced to make the quasi-static analysis more reliable, and the normal distribution of energy transfer ratio caused by lateral impact on pipes is presented by statistic analysis of experimental results based on the effective yield strength, which provides experimental and theoretical basis for the risk analysis of submarine pipe system impacted by dropped objects. Failure strains of pipe material are confirmed by comparing experimental results with finite element simulation. In addition, impact contact area and impact time are proved to be the major influence factors of energy transfer by sensitivity analysis of the finite element simulation.

关 键 词：IMPACT PIPE energy transfer quasi-static analysis FE simulation 

分 类 号：P756.2[天文地球—海洋科学]