管道支吊架管夹断裂失效数值分析
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摘要
针对某支吊架管夹的断裂失效,开展了管夹断口分析、金相分析及冲击试验等研究管夹断裂机理,建立了管夹数值分析模型,分析了裂纹对管夹关键位置应力分布的影响,并对管夹进行了优化设计。结果表明管夹的断裂主要是由低温服役环境以及制造成形过程形成的裂纹所致,属于低温脆性断裂。因此在支吊架管夹设计时应考虑实际服役环境以及制造成形工艺可能带来的缺陷等对管夹服役强度的影响,并可通过优化管夹厚度的方式来提高管夹承载强度,从而保障管道系统的安全运行。
With respect to the fracture of the pipe clamp of pipe supports and hangers, the macroscopic inspection and impact test were carried out to study the causes of the fracture. And through establishing the numerical model of pipe clamp with and without crack, the influence of crack on the stress distribution in key locations in pipe clamp was analyzed. It was showed from the results that the fracture of pipe clamp was brittle fracture with low temperature, which was due to low temperature environment and the cracks formed during the manufacturing process. Therefore, the influence of actual service environment and possible defects caused by manufacturing process on the service strength of pipe clamp should be taken into account in the pipe clamp design of piping system. And the bearing strength can be improved by optimizing the thickness of pipe clamp to guarantee the safe operation of piping system.
With respect to the fracture of the pipe clamp of pipe supports and hangers, the macroscopic inspection and impact test were carried out to study the causes of the fracture. And through establishing the numerical model of pipe clamp with and without crack, the influence of crack on the stress distribution in key locations in pipe clamp was analyzed. It was showed from the results that the fracture of pipe clamp was brittle fracture with low temperature, which was due to low temperature environment and the cracks formed during the manufacturing process. Therefore, the influence of actual service environment and possible defects caused by manufacturing process on the service strength of pipe clamp should be taken into account in the pipe clamp design of piping system. And the bearing strength can be improved by optimizing the thickness of pipe clamp to guarantee the safe operation of piping system.
引文
[1]陈敏,张周红.复杂管道应力分析中的支吊架布置方法[J].压力容器, 2009, 26(3):21-25.
[2]王海帅,刘明,何桂宽,等.支吊架20钢管夹断裂原因分析[J].发电与空调, 2015(4):42-44.
[3]李永正.核电管路支吊架极限承载能力研究[D].江苏:江苏科技大学, 2008.
[4]郭延军.火力发电厂在役管道支吊架失效分析[J].热力发电,2008, 37(2):84-86.
[5]李丹.火电厂蒸汽管道支吊架的检查与调整[J].山东工业技术, 2018(8):182-183.
[6]郭延军.火力发电厂在役管道支吊架失效分析[J].热力发电,2008, 37(2):84-86.
[7]GB/T 700—2006,碳素结构钢[S].
[8]GB/T 17116. 1—1997,管道支吊架[S].
[9]李海龙,高付海,李楠.重型双孔管夹应力分析与评定[J].核动力工程, 2011(s1):117-119.
[10]GB/T 19624—2004,在用含缺陷压力容器安全评定[S].
[2]王海帅,刘明,何桂宽,等.支吊架20钢管夹断裂原因分析[J].发电与空调, 2015(4):42-44.
[3]李永正.核电管路支吊架极限承载能力研究[D].江苏:江苏科技大学, 2008.
[4]郭延军.火力发电厂在役管道支吊架失效分析[J].热力发电,2008, 37(2):84-86.
[5]李丹.火电厂蒸汽管道支吊架的检查与调整[J].山东工业技术, 2018(8):182-183.
[6]郭延军.火力发电厂在役管道支吊架失效分析[J].热力发电,2008, 37(2):84-86.
[7]GB/T 700—2006,碳素结构钢[S].
[8]GB/T 17116. 1—1997,管道支吊架[S].
[9]李海龙,高付海,李楠.重型双孔管夹应力分析与评定[J].核动力工程, 2011(s1):117-119.
[10]GB/T 19624—2004,在用含缺陷压力容器安全评定[S].