用于钻机支撑连接的螺栓疲劳寿命分析  

Fatigue life analysis on support and connection bolts in drilling rig

作　　者：赵克利[1] 李鑫[1] 李光志[2] 雷永亮[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]长春汽车工业高等专科学校,长春130011

出　　处：《强度与环境》2015年第4期19-23,共5页Structure & Environment Engineering

摘　　要：疲劳断裂是钻机中连接螺栓的主要失效形式。结合工程实际,建立基于线性疲劳累积损伤理论的高强度螺栓安全寿命估算方法,绘制螺栓零件的S-N曲线,并利用修正Miner准则估算螺栓的疲劳寿命。借助有限元平台以及疲劳仿真软件n Soft的FE-Fatigue模块,对连接螺栓进行疲劳强度仿真试验,确定了动应力下连接螺栓的疲劳损伤位置,并得到仿真疲劳寿命,验证了理论计算疲劳寿命的合理性。对高强度螺栓的疲劳设计、校核以及寿命估算有一定的借鉴意义。Fatigue fracture is the main failure form of support and connection bolts in drilling rig. A safety life estimation method of high strength bolts is established based on linear fatigue cumulative damage theory after considering engineering situation. The S-N curve of the bolt is drawn and fatigue life is estimated by correction Miner law. Simulation fatigue test is carried out via finite element platform and the FE-Fatigue module of nSoft. The fatigue position is located and fatigue life is calculated and it proves the theoretical fatigue life to be reasonable. The conclusion of this article may benefit to fatigue designing, checking or estimating on high strength bolts.

关 键 词：螺栓 疲劳寿命 线性累积损伤理论 修正Miner准则 疲劳仿真试验 

分 类 号：TH131.1[机械工程—机械制造及自动化]