结构形式对场桥轨道疲劳寿命的影响

摘要

针对场桥焊接式轨道在服役过程出现角焊缝疲劳开裂的问题，文中从改善轨道结构形式的角度对轨道焊接结构的疲劳寿命进行研究，主要研究了装配间隙与衬垫板对焊接结构疲劳寿命的影响。研究发现，轨道与底板之间存在装配间隙时，会降低轨道疲劳寿命；轨道无衬垫板结构的抗疲劳性能优于有衬垫板结构。%In view of any fatigue cracking of fillet weld when the welded track of the yard crane is in service,the pa-per presents research on fatigue life of the track welded structure from the perspective of improving track structure,with em-phasis on effect of assembling clearance and lining plank on fatigue life of the welded structure.It's found that any assemb-ling clearance between the track and the base plate may reduce fatigue life of the track.The track without base plate is pro-vided with the better anti-fatigue performance that that with base plate.