重型机械Issue(2)：45-50,6.
P92钢主蒸汽管道在温度与振动作用下的形变响应试验研究
Experimental study on deformation response of P92 steel main steam pipeline under temperature and vibration
摘要
Abstract
To investigate the deformation characteristics of P92 steel main steam pipelines with welds under the coupled effects of temperature and low-frequency vibration,plate specimens were prepared from retired main steam pipeline sections of a thermal power plant.Using a high-temperature tensile testing machine and strain monitoring system,strain response tests were conducted under different tensile loads and 5-10 Hz low-frequency vibration excitation at elevated temperatures of 300℃,500℃,and 600℃.The results indicate that surface deformation intensifies with increasing temperature.At 500℃,the strain range is[1198,3360]με,while at 600℃,the strain increase is significantly greater than that at 500℃.Under constant temperature and load,strain fluctuations are approximately 20 με.External low-frequency impact vibration causes an instantaneous strain drop,with fluctuation amplitudes at high strain levels(around 50 με)exceeding those at low strain levels(around 20 με).After vibration ceases,the strain recovers to its original trend.These findings provide an experimental basis for the safe operation and deformation monitoring of main steam pipelines in thermal power plants.关键词
主蒸汽管道/P92钢/高温拉伸/低频振动/应变响应Key words
main steam pipeline/P92 steel/high-temperature tension/low-frequency vibration/strain response分类
矿业与冶金引用本文复制引用
于政洋,刘旭,申泰瑞,任肖祥..P92钢主蒸汽管道在温度与振动作用下的形变响应试验研究[J].重型机械,2026,(2):45-50,6.基金项目
西安工程大学大学生创新训练计划项目(202510709047,X202510709179) （202510709047,X202510709179）
陕西省自然科学基础研究计划项目(2019JQ-851)资助 （2019JQ-851）
