焊管2025，Vol.48Issue(10)：14-23,10.DOI:10.19291/j.cnki.1001-3938.2025.10.003
落物冲击作用下寒区边坡埋地管道动力响应行为研究
Study on Dynamic Response Behavior of Pipeline in Cold Slope Regions under Impact of Falling Objects
摘要
Abstract
In order to explore the dynamic response of buried slope pipelines under the impact of falling objects in cold regions,a nonlinear dynamic model was developed using an explicit dynamic analysis method.This model accounts for the nonlinear contact between falling objects and frozen soil,as well as between frozen soil and the pipeline,along with the material nonlinearities of the pipeline and frozen-soil.The effects of falling object characteristics,including the impacts of shape,impact position,impact energy,and frozen-soil moisture content on the dynamic response behavior of the pipeline were discussed.The results show that the residual stress and deformation of the pipeline are the largest when the falling object is spherical among different-shaped falling objects.With the change in distance between the impact position of the falling object and the bottom of the slope,the maximum residual stress of the pipeline decreases first and then increases.When this distance reaches 2 m,the condition of a falling object impacting the pipeline along a slope can be regarded as the problem of a pipeline in an impact-flat area.With the increase in the impact energy of the falling material,the maximum residual stress and deformation of the pipeline tend to increase.Specifically,the residual stress increases from 9.98 MPa to 51.4 MPa,approximately 5 times the initial value.The residual stress and deformation showed an increasing trend with the boost of frozen-soil moisture content.Specifically,the residual stress increased from 26.2 MPa to 40.9 MPa,an increase of about 56%.However,the frozen-soil moisture content has little effect on the cross-section deformation at the pipeline impact point.关键词
边坡埋地管道/落物冲击/动力响应/影响因素/残余应力分布/管道变形Key words
buried slope pipeline/impact of falling objects/dynamic response/residual stress distribution/pipeline deformation分类
能源科技引用本文复制引用
李鑫杰,李巧珍,刘昊明,王超,王皓,雍太松..落物冲击作用下寒区边坡埋地管道动力响应行为研究[J].焊管,2025,48(10):14-23,10.基金项目
大庆市指导性科技计划项目"斜坡冻土滑塌诱发原油管道局部屈曲失稳研究"(项目编号zd-2023-33) （项目编号zd-2023-33）
东北石油大学人才引进科研启动经费资助项目"极端服役条件下含复合缺陷管道耦合力学分析"(项目编号2019-KQ23). （项目编号2019-KQ23）
