第３７卷第４期２０２３年７月POWEREQUIPMENTVol．３７,No．４Jul．２０２３收稿日期:２０２２Ｇ１０Ｇ２３;修回日期:２０２２Ｇ１１Ｇ２２作者简介:金传领(１９９０—),男,工程师,从事工业设备结构分析工作.EＧmail:jinchuanl＠１６３．com机组变负荷对省煤器入口管道焊接结构疲劳寿命影响的分析金传领,万瑜,徐家驹,林劭辰,石仁强,高严(江苏方天电力技术有限公司,南京２１１１０２)摘要:研究某６００MW火电机组负荷变化对省煤器入口管道结构疲劳寿命的影响,采用材料拉伸试验、疲劳试验及数值模拟３种方法,分别得到应变与疲劳寿命之间的关系.结果表明:材料拉伸试验预测结构寿命与疲劳试验的偏差较大,而数值模拟结果与疲劳试验结果较为吻合,数值模拟方法能够合理评估结构疲劳性能,并且结构疲劳损伤随机组负荷变化幅度的增大而明显增大.关键词:火电机组;锅炉;管道;变负荷;疲劳试验;寿命预测中图分类号:TM６２１．２５文献标志码:A文章编号:１６７１Ｇ０８６X(２０２３)０４Ｇ０２１２Ｇ０５DOI:１０．１９８０６/j．cnki．fdsb．２０２３．０４．００２AnalysisoftheInfluenceofVariableLoadonFatigueLifeofEconomizerInletPipelineStructureinaThermalPowerUnitJinChuanling,WanYu,XuJiaju,LinShaochen,ShiRenqiang,GaoYan(JiangsuFrontierElectricTechnologyCo．,Ltd．,Nanjing２１１１０２,China)Abstract:Researcheswereconductedontheinfluenceofthevariableloadonthefatiguelifeoftheeconomizerinletpipelinestructureina６００MWthermalpowerunit,therelationshipbetweenstrainandfatiguelifewasobtainedthroughfollowingthreemethods,suchasmaterialtensiletest,fatiguetest,andnumericalsimulationmethod．Resultsshowthat,thefatiguelifeofmaterialtensiletestisquitedifferentfromthatobtainedbyfatiguetest,whilethefatiguelifeofnumericalsimulationmethodisinaccordancewiththatoffatiguetest．Thefatigueperformanceofthestructurecanbereasonablyevaluatedbynumericalsimulationmethod,whilethelifelossofthestructuresignificantlyincreaseswiththeincreaseofthechangerangeoftheunitload．Keywords:thermalpowerunit;boiler;pipeline;variableload;fatiguetest;lifeprediction燃煤机组参与调峰时,机组负荷升降变化迅速且范围较大,尤其在涉及深度调峰时,机组需要在短时间内完成启停操作,如采用两班制运行方式调节电网负荷时,需要从...
