基于名义应力法与局部应力-应变法的绳轮寿命评估  

Fatigue Life Evaluation of Deadline Anchor Based on Nominal Stress Method andLocal Stress-Strain Method

作　　者：秦赛博 易先中[1] 易军 皮运松 蔡星星 冀玉松 陈志湘 QIN Saibo;YI Xianzhong;YI Jun;PI Yunsong;CAI Xingxing;JI Yusong;CHEN Zhixiang(School of Mechanical Engineering,Yangtze University,Jingzhou Hubei 434023,China;Hubei Intelligent Oil and Gas Drilling Equipment Joint Innovation Center,Jingzhou Hubei 434000,China;Hubei Jianghan Petroleum Instrumentation Co.,Ltd.,Wuhan Hubei 430205,China;Yangzhou Huayuan Oil and Gas Technology Co.,Ltd.,Yangzhou Jiangsu 225000,China)

机构地区：[1]长江大学机械工程学院,湖北荆州434023 [2]湖北省智能油气钻采装备企校联合创新中心,湖北荆州434000 [3]湖北江汉石油仪器仪表股份有限公司,湖北武汉430205 [4]扬州华元油气技术有限公司,江苏扬州225000

出　　处：《机床与液压》2024年第18期41-47,共7页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(51974035);国家自然科学基金联合基金项目(U1262108;U1762214);湖北省重点研发计划项目(2020BAB055)。

摘　　要：死绳固定器绳轮在钻井生产实际使用中承受着高强度交变载荷,极易发生疲劳破坏。为准确评估绳轮的疲劳寿命,以JZG18C型死绳固定器为研究对象,结合Goodman等寿命曲线修正的名义应力法和Morrow弹性应力修正的局部应力-应变法,估算死绳固定器绳轮在最大死绳拉力下的疲劳寿命。结果表明:JZG18C型死绳固定器绳轮寿命薄弱位置为传感器支臂过渡圆角处(疲劳寿命安全系数n 1=0.4351),在名义应力法及局部应力-应变法下绳轮薄弱位置处的最小疲劳寿命分别为38194次(3.5年)、37120次(3.4年),2种疲劳寿命评估的理论计算结果与有限元分析得到的疲劳寿命结果分别相差0.38%、2.51%,验证了以名义应力法与局部应力-应变法评估死绳固定器疲劳寿命的可靠性与准确性。The deadline anchor rope wheel is subjected to high-strength alternating load in the actual use of drilling production,and it is prone to fatigue failure.In order to accurately evaluate the fatigue life of the rope wheel,taking the JZG18C deadline anchor as the research object,a method for estimating the fatigue life of the deadline anchor rope wheel under the maximum dead rope tension was proposed using the nominal stress method modified by Goodman equal life curve and the local stress-strain method modified by Morrow elastic stress.The results show that the weak position of the rope wheel of JZG18C deadline anchor is the corner of the sensor arm transition(fatigue life safety factor n 1=0.4351).The minimum fatigue life at the weak position of the rope wheel under the nominal stress method and local stress-strain method are 38194 times(3.5 years)and 37120 times(3.4 years),respectively;and the theoretical calculation results of the two fatigue life evaluations differ from the fatigue life results obtained by finite element analysis by 0.38%and 2.51%,respectively,the reliability and accuracy of evaluating the fatigue life of deadline anchor by nominal stress method and local stress-strain method are verified.

关 键 词：死绳固定器 疲劳寿命 名义应力法 局部应力-应变法 

分 类 号：TE922[石油与天然气工程—石油机械设备]