基于顺序法的起重机疲劳寿命预测方法研究及应用  

Research and application of crane fatigue life prediction method based on sequential method

作　　者：冯月贵 谢尧林[2] 贾民平[2] 胡静波 

机构地区：[1]南京市特种设备安全监督检验研究院,南京210002 [2]东南大学机械工程学院,南京211189

出　　处：《起重运输机械》2013年第2期1-5,共5页Hoisting and Conveying Machinery

基　　金：国家质检总局科技计划资助项目(2009QK151);国家自然科学基金资助项目(51075070);江苏省科技成果转化专项资金资助项目(BA2010048)

摘　　要：针对起重机一般作业于随机循环载荷下,承受循环交变应力的实际情况,提出了基于顺序法的起重机寿命预测方法,建立了起重机顺序循环应力损伤模型。根据起重机实测应力历程数据,利用雨流计数法统计出应力循环次数,获得不同应力幅对应的循环次数并编制循环载荷谱,再根据编制的载荷谱利用顺序循环应力损伤模型对该起重机进行寿命估算。将估算结果与根据Miner模型、Carten-Dolan模型的估算结果进行对比分析。对比分析表明:所提出的顺序循环应力损伤模型对起重机疲劳寿命预测是可行的,为起重机疲劳寿命预测研究提供了一种新的思路。Considering the situation that cranes are generally in service under the random cyclic load and bear cyclic alternating stress, the paper puts forward a life prediction method for crane based on sequential method, with establishment of the order cyclic damage stress model. According to the measured stress process data of the crane, the number of stress cycles is figured out by the rain-flow counting method, with the cycle times corresponding to fjifferent stress amplitudes ob- tained, and with a cyclic loading spectrum developed. Based on this spectrum, the crane life is estimated using the order cyclic damage stress model. The estimated result and the one worked out based on Miner lodel and Carten-Dolan model are compared and analyzed, which shows that the proposed order cyclic damage stress model is feasible for predietion of crane＇s fatigue life, providing a new idea for research on crane＇s fatigue life.

关 键 词：起重机 顺序法 循环顺序法 寿命预测 研究 

分 类 号：TH21[机械工程—机械制造及自动化]