Experimental Research Of The Submarine Pipelines Under Dynamic Loading

As an important infrastructure of offshore oil and gas field development, offshore pipelines take an irreplaceable important role to ensure transportation of oil and gas. At the same time, there are more and more problems in the process of construction, construction and application, such as a pipeline leak, pollution, explosion and other accidents, which will bring a very serious and even immeasurable loss on the marine environment and the implementation of the submarine pipeline project. Importance as well as the security problem of seabed pipeline, it is urgent to promote the innovation of the design and construction personnel idea and the management level. The joint action of waves, currents and seismic response and failure mode of the research is not mature enough for pipeline at home and abroad, especially the lack of necessary model test research. In this paper, we make the submarine pipeline under the action of wave and earthquake single and joint dynamic response model test underwater earthquake-wave flow test simulation system. In this model test, we consider influence of currents and waves, the determination of suspended span length, height of suspended span and different earthquake excitation, and we obtain a variety of working conditions of the test data. We analysis the internal and external fluid influence on pipeline natural vibration characteristics. Through finite element analysis software to simulate model test conditions, we compared the results of numerical model analysis and experimental results, which verified the reliability of the finite element calculation model.