管道技术与设备
管道技術與設備
관도기술여설비
Pipeline Technology and Equipment
2015年
5期
11-13,47
,共4页
赵树炳%张志强%罗丽华%赵振兴
趙樹炳%張誌彊%囉麗華%趙振興
조수병%장지강%라려화%조진흥
普通凹坑%爆破压力%中心点%管道变形%应力%凹坑深度
普通凹坑%爆破壓力%中心點%管道變形%應力%凹坑深度
보통요갱%폭파압력%중심점%관도변형%응력%요갱심도
plain dents%burst pressure%central point%pipe deformation%stress%dent depth
文中总结了国内外标准对普通凹坑尺寸的规定及存在的问题。采用有限元方法，模拟了管道上不同深度普通凹坑生成过程，以及在内压作用下普通凹坑中心点的应力变化过程。研究了无约束和受约束普通凹坑对管道爆破压力的影响，得出无约束普通凹坑对管道爆破压力没有影响，凹坑深度超过20％OD的受约束普通凹坑对管道爆破压力影响较大的结论，并对普通凹坑的处理提出了建议。
文中總結瞭國內外標準對普通凹坑呎吋的規定及存在的問題。採用有限元方法，模擬瞭管道上不同深度普通凹坑生成過程，以及在內壓作用下普通凹坑中心點的應力變化過程。研究瞭無約束和受約束普通凹坑對管道爆破壓力的影響，得齣無約束普通凹坑對管道爆破壓力沒有影響，凹坑深度超過20％OD的受約束普通凹坑對管道爆破壓力影響較大的結論，併對普通凹坑的處理提齣瞭建議。
문중총결료국내외표준대보통요갱척촌적규정급존재적문제。채용유한원방법，모의료관도상불동심도보통요갱생성과정，이급재내압작용하보통요갱중심점적응력변화과정。연구료무약속화수약속보통요갱대관도폭파압력적영향，득출무약속보통요갱대관도폭파압력몰유영향，요갱심도초과20％OD적수약속보통요갱대관도폭파압력영향교대적결론，병대보통요갱적처리제출료건의。
The specification of plain dents by the domestic and foreign standards and the existing problems were summa -rized.Through the finite element method , the produce process of plain dent with different depth on pipeline was simulated , and the stress change curve of center point of the plain dent under the inner pressure was simulated .The influence of unconstrained and constrained ordinary dents on burst pressure was researched .The conclusion that the plain dents have no effect on the burst pressure of pipelines and constrained ordinary dents with depth of more than 20%OD have great effects on the pipe burst pressure were drawn .Suggestions to deal with the plain dents was put forward .
