[1]蓝朝逊,李俊,史君林,等.埋地PE燃气管道弯头挖掘破坏有限元分析[J].中国安全生产科学技术,2018,14(8):86-93.[doi:10.11731/j.issn.1673-193x.2018.08.014]
LAN Chaoxun,LI Jun,SHI Junlin,et al.Finite element analysis on excavation failure of elbow in buried PE gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(8):86-93.[doi:10.11731/j.issn.1673-193x.2018.08.014]
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埋地PE燃气管道弯头挖掘破坏有限元分析
LAN Chaoxun,LI Jun,SHI Junlin,et al.Finite element analysis on excavation failure of elbow in buried PE gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(8):86-93.[doi:10.11731/j.issn.1673-193x.2018.08.014]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 14
- 期数:
- 2018年8期
- 页码:
- 86-93
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2018-08-31
文章信息/Info
- Title:
- Finite element analysis on excavation failure of elbow in buried PE gas pipeline
- 文章编号:
- 1673-193X(2018)-08-0086-08
- Keywords:
- third party excavation; elbow in PE gas pipeline; finite element analysis; excavation load
- 分类号:
- X924.4
- 文献标志码:
- A
- 摘要:
- 为分析挖掘载荷对PE燃气管道弯头的失效特征及影响因素，利用Abaqus建立了挖掘斗齿管道弯头土体多体动力学模型，将管道破坏过程分为接触、屈服、挖裂和挖穿4个阶段，分析了不同挖掘条件下，弯头破坏的力学响应。研究结果表明:管道被挖裂之前，外侧应力、应变大于内侧，此后弯头形变量明显增加，内测应力、应变大于外侧；挖掘速度越慢，管道椭圆度越大；斗齿沿轴向挖掘时，变形从齿管接触面两端产生，沿径向挖掘时，危险点出现在齿管接触中心位置，后者变形更大；同样径厚比的弯头，管径越小，挖穿时形变越大。
- Abstract:
- In order to analyze the failure characteristics and influencing factors of excavation load on the elbow in PE gas pipeline, a multibody dynamic model of excavator bucket teeth, pipeline elbow and soil body was established by using Abaqus. The process of pipeline failure was divided into four stages, namely contact, yield, excavation into the pipeline wall and excavation through the pipeline wall, and the mechanical response of elbow failure under different excavation conditions was analyzed. The results showed that the external stress and strain of the pipeline were greater than those on the inside before the excavation into the pipeline wall, while after that, the deformation quantity of elbow increased obviously, and the internal stress and strain were greater than those on the outside. The slower the excavation speed, the larger the ellipticity of pipeline. When the bucket teeth excavated in the axial direction, the deformation generated from both ends of the contact surface of teeth and pipeline, while when the bucket teeth excavated in the radial direction, the dangerous point appeared at the position of the contact center of teeth and pipeline, and the deformation of the latter was larger. For the elbow with the same diameterthickness ratio, the smaller the diameter of pipeline, the larger the deformation in case of the excavation through the pipeline wall.
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备注/Memo
- 备注/Memo:
- 国家质检总局科研项目（2017QK121）；过程装备与控制工程四川省高校重点实验室项目（Gk201809）
