In response to the issue that the pantograph-catenary force calculated by traditional simulation methods cannot accurately analyze the fatigue life of the contact wire under the influence of complex environmental factors during actual operation,the measured data of pantograph-catenary force is obtained through the collected vertical contact force,compensation acceleration,and aerodynamic lifting force of the pantograph-catenary system with the help of a high-speed comprehensive inspection train and the pantograph-catenary equivalent mass model on the basis of the force analysis of the contact wire.Then,the rainflow counting method is applied to process the data by compressing,extracting peak and valley values,and cycle counting.On this basis,by combining the material characteristics of the contact wire,the fatigue life of the contact wire and the safe operation years of the up and down contact wires under single pantograph operation are determined.A comparative analysis is conducted to examine the impact of the contact force on the fatigue life of the contact wire under single and double pantograph operation and before and after maintenance.The results indicate that there is a significant variation in the fatigue life of the contact wire within each anchor section of the line,with the contact wire at concentrated mass load points such as anchor points or suspension wires typically having a shorter fatigue life.Under single pantograph operation,the minimum safe operation lifespan of the contact wire is 13.05 years;for double pantograph operation,it is 10.03 years,which is less than that of single pantograph operation.After maintenance of the contact wire,the minimum safe operation lifespan under single pantograph operation is increased to 17.78 years,with the overall safe operation lifespan ranging between 17.78 and 28.38 years.
关键词
高速铁路接触线/疲劳寿命/雨流计数法/弓网接触力
Key words
High-speed railway catenary/Fatigue life/Rainflow counting method/Pantograph-catenary contact force
维普
万方数据