摘要
目前水工钢闸门结构寿命预测公式过于简化,只考虑了锈蚀对闸门构件厚度的影响,同时还将闸门锈蚀过程简化成一个均匀线性的过程。而闸门锈蚀不仅仅影响闸门构件的厚度,对闸门金属材料性能也有很大影响,特别是随着锈蚀程度增加,对材料性能的影响程度也会增加。故本文考虑到锈蚀对闸门材料性能的影响,基于金属材料性能退化规律,结合金属任意损伤与金属日历寿命关系曲线即D-H曲线推导出了新的闸门构件寿命预测的公式,并根据该公式对实际工程中的闸门寿命进行预测。计算结果表明,预测结果与实际结果拟合程度较好,能够更加准确的预测闸门寿命。根据预测的闸门剩余寿命能够判断闸门运行安全状态,以便及时维修或者更换闸门,从而减少闸门失事事故的产生。
At present,the life prediction formula of hydraulic steel gate structures commonly used is too simple,only with the influence of corrosion on the thickness of the gate members taken into account,and the process of gate corrosion simplified into a uniform linear one.Not only does the corrosion of the gate damage the thickness of the gate components,but also it has a great influence on the material properties of the gate.Especially as the degree of corrosion develops,the influence on the material properties will also increase.Therefore,with the influence of corrosion on the material properties of gates considered,based on the degradation law of metal materials and the D-H curve of metal damage against history,the original life prediction formula of steel gate components is derived in this paper.In addition,the life of the gate of an actual project is predicted according to the proposed formula and it turns out that the prediction results are well fitted to the actual data,and thus the gate life can be predicted more accurately with the formula applied.Furthermore,on the basis of the predicted remaining life of the gate,the potential hazards of the gate can be verified ahead of time,so that the gate can be repaired or replaced in time,thereby preventing the occurrence of accidents.
作者
李伟康
王畅
张博越
LI Weikang;WANG Chang;ZHANG Boyue(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,Jiangsu,China;Center of Constrction&Quality&Safety Supervsion,MWR,Beijing 100038,China;Chongqing Western Water Resources Development Co.,Ltd,Chongqing 401121,China)
出处
《水利水电技术》
北大核心
2019年第7期87-91,共5页
Water Resources and Hydropower Engineering
基金
国家重点研发计划(2017YFC0404903)
关键词
钢闸门
D-H曲线
腐蚀常数
性能退化
寿命预测
Steel gate
D-H curve
corrosion constant
performance degradation
life prediction
