基于Workbench防冲刺短节疲劳寿命分析  

The Analysis of Fatigue Life About Erosion Resistance Device Based on Workbench

作　　者：艾志久[1] 李杰[1] 刘绘新[2] 彭旭[3] 胡坤[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]西南石油大学石油工程学院,四川成都610500 [3]中国石化河南石油勘探局,河南南阳473000

出　　处：《西南石油大学学报（自然科学版）》2013年第2期174-178,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石油2011年塔里木油田重点项目"工艺安全与钻完井工程基础研究"子课题(TLMYT-2011-GC-007)

摘　　要：在井控作业中,高速、高压流体冲击防冲刺短节,产生脉动循环冲击载荷,易产生冲击疲劳。通过疲劳寿命理论计算得出防冲蚀短节满足疲劳强度要求。然后,根据材料的S-N曲线,通过ANSYS Workbench多物理场耦合分析平台完成对防冲刺短节流固耦合分析,得到作用于防冲刺短节的载荷谱。利用Ncode DsignLife疲劳分析方法对防冲刺短节进行疲劳寿命数值模拟,采用疲劳安全系数作为疲劳强度失效评价标准,得到防冲刺短节关键区域安全系数均大于1,满足其疲劳强度设计要求,且安全系数云图与应力云图分布位置相同,说明数模结果具有一定指导意义。In well control operation, the high speed and high pressure fluid impacts erosion resistance device, generates pulsating cycle impacting load and easily leads to the impacting fatigue. According to fatigue life theory, we make calculations and find out the point where the erosion resistance device meets fatigue strength requirements. Afterwards, according to the S - N curve of the material, we carry out the fluid-solid interaction analysis and get the load spectrum acting on the erosion resistance device based on ANSYS Workbench platform of multi-physical interaction analysis. Fatigue analysis software Ncode DsignLife is used to accomplish the numerical simulation of fatigue life of the erosion resistance device, and the fatigue safety coefficient is presented as fatigue strength failure evaluation standard in the paper. We also find out that the safety factor about the key region of the erosion resistance device is greater than 1, the requirements about fatigue strength design are met, and the cloud chart of safety factor and stress distribution are in the same position, which means that the numerical simulation results have some guide significances.

关 键 词：防冲刺短节 流固耦合 疲劳寿命 冲击疲劳 WORKBENCH 

分 类 号：TE931[石油与天然气工程—石油机械设备]