Study on the effect of gas explosion on other pipelines in the integrated water and gas pipeline corridor
In the case of"water and gas sharing"in the integrated pipeline corridor,if the gas pipeline leaks and causes the explo-sion,it may lead to the failure and damage of the water supply pipeline in the same tank.In order to study the influence of gas ex-plosion on the same cabin pipeline,the method of methane-air mixed gas was defined by the nonlinear finite element program ANSYS/LS-DYNA,and the changes of strain,stress,vibration velocity and displacement of the same cabin pipeline under the ac-tion of gas explosion were studied through numerical simulation.According to the criterion of elliptic failure,the four influencing factors of pipe wall thickness,internal pressure,elastic modulus and yield strength were quantitatively analyzed.The results show that,under the action of gas explosion,the ovality of the same tank pipeline is negatively correlated with the wall thickness,in-ternal pressure,elastic modulus and yield strength,and the yield strength has the least influence on the ovality of the same tank pipeline,all of which are lower than 3%of the critical dimension-less ovality.When the change rate of the influencing factors in-creases from 2.5%to 15%,the influence of wall thickness and elastic modulus on the ovality of the pipeline is higher,while the influence of internal pressure and yield strength on the ovality of the pipeline is lower.The research results can provide reference for the planning and design of the"water-air co-cabin"in the inte-grated pipeline corridor and the improvement of relevant norms.
integrated pipe corridorintegrated water and gas pipelinegas explosioncabin pipingovality
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