Dynamic response analysis of neritic gas pipeline impacted by dropped objects

doi:10.16265/j.cnki.issn1003-3033.2018.06.018

Abstract

Abstract: In order to carry out further research into the impact damage process of neritic gas pipelines caused by dropped objects,the dynamic response was analyzed by the simplified analytical method and numerical simulation method.The impact loads of dropped objects were calculated by non-perfect elastic collision theory and momentum conservation law.The transmission of impact load in soil was analyzed based on J.Boussinesq method,and the attenuation coefficient was used in analyzing the transmission in the concrete layer.Then the internal force was calculated.Workbench LS-DYNA software was used to simulate the dynamic response process of neritic gas pipeline impacted by dropped objects.The results show that the distribution of impact load obtained by simulation is similar to that obtained by J.Boussinesq method,but the speed of attenuation is faster,and that because the soil layer and concrete protective layer absorb most of the impact energy,the impact load on the pipeline is limited.

Key words: neritic gas pipelines, dropped objects impact, impact load, workbench LS-DYNA, dynamic response

CLC Number:

X944

LUO Jiqing, YAO Anlin, HE Sha, ZHOU Xue, WANG Xiaomei, LIU Yisi. Dynamic response analysis of neritic gas pipeline impacted by dropped objects[J]. China Safety Science Journal, 2018, 28(6): 103-109.

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