Investigation of liquid on Pressure and stress of Buried Pipe under Explosion waves

چکیده مقاله

One of the most important lifeline is the water pipelines that may be subjected to explosion. In this paper a parametric study on the buried pipe in the soil has been performed due to blast loading. Effects of various parameters have been investigated such as physical properties of water, air, soil, pipe and T.N.T. The arbitrary Lagrangian-Eulerian method has been used by the LS-DYNA software. An arbitrary Lagrangian-Eulerian algorism is used in order to prevent the element distortion in large deformation and nonlinear structural analyses.The results shows the pressure and stress value of the pipe crown, slight increase firstly, then increases to a peak and decreases finally. That is because the explosive loading direction is opposed to the pressure of fluid in a buried pipe that causing the pressure descending. so, pressure of fluid in buried pipe can do a favor to stabilizing pipe pressure.

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