CHE Xiao-yu, DUAN Meng-lan, ZENG Xia-guang, GAO Pan, PANG Yi-qian. Experimental Study and Numerical Simulation of Global Buckling of Pipe-in-Pipe Systems[J]. Applied Mathematics and Mechanics, 2014, 35(2): 188-201. doi: 10.3879/j.issn.1000-0887.2014.02.007
Citation: CHE Xiao-yu, DUAN Meng-lan, ZENG Xia-guang, GAO Pan, PANG Yi-qian. Experimental Study and Numerical Simulation of Global Buckling of Pipe-in-Pipe Systems[J]. Applied Mathematics and Mechanics, 2014, 35(2): 188-201. doi: 10.3879/j.issn.1000-0887.2014.02.007

Experimental Study and Numerical Simulation of Global Buckling of Pipe-in-Pipe Systems

doi: 10.3879/j.issn.1000-0887.2014.02.007
Funds:  The National Basic Research Program of China (973 Program)(2011CB013702);The National Natural Science Foundation of China(50979113)
  • Received Date: 2013-06-07
  • Rev Recd Date: 2013-07-24
  • Publish Date: 2014-02-15
  • Offshore pipelines are usually buried to avoid damage from fishing activities and get thermal insulation. Provided that the pipelines are sufficiently confined in the lateral direction by the passive resistance of the trench walls, they may be liable to upheaval buckling caused by rise in axial force due to temperature changes or other factors. Unless lateral restraint is provided, by trenching the line, for example, lateral buckling will be dominant. The axial compressive force is the primary cause of pipeline buckling. Lateral buckling takes place at a lower axial compressive force than upheaval buckling. The complex structure of the pipe-in-pipe (PIP) system makes global buckling difficult to tackle by theoretical analysis. An experimental study of the global buckling of pipelines was conducted by means of a small-scale model test apparatus. Results were presented for several tests involving both the relationship between the axial force and displacement and the critical axial force. Futhermore, the efficient finite element model was used to simulate the pre-buckling and post-buckling states of the pipeline with the latest tube-to-tube technology. The comparison shows that the numerical simulation results agree well with the experimental ones.
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