航空发动机液压管路疲劳寿命预测模型研究  

Research on Fatigue Life Prediction Model of Aero-engine Hydraulic Pipeline

作　　者：闫国华[1,2] 杜豪 刘勇 刘中华[3] YAN Guohua;DU Hao;LIU Yong;LIU Zhonghua(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Engineering Techniques Training Center,Civil Aviation University of China,Tianjin 300300,China;AECC Shenyang Engine Research Institute,Shenyang Liaoning 110015,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学工程技术训练中心,天津300300 [3]中国航发沈阳发动机研究所,辽宁沈阳110015

出　　处：《机床与液压》2023年第8期171-175,共5页Machine Tool & Hydraulics

基　　金：中央高校基本科研业务费项目中国民航大学专项(3122019093);中国民航大学科研启动基金项目(2020KYQD76);天津市教委科研计划项目(2020KJ017)。

摘　　要：为较为准确地评估航空发动机液压管路的疲劳寿命,提出一种疲劳寿命预测模型。该模型重点计算一个循环周期内载荷对液压管路造成的损伤,在此基础上,建立液压管路危险点处的应力与疲劳寿命之间的解析关系式。将该模型用于某型航空发动机外部液压管路疲劳寿命的计算,并将该理论计算结果与有限元仿真结果进行对比,验证了该疲劳寿命预测模型的有效性。In order to more accurately assess the fatigue life of aero-engine hydraulic pipelines,a fatigue life prediction model was proposed.This model focused on calculating the damage to the hydraulic pipeline caused by the load in a cycle.On this basis,the analytical relationship between the stress at the dangerous point and the fatigue life of the hydraulic pipeline was established.The model was used to calculate the fatigue life of a certain type of aero-engine external hydraulic pipeline,and the theoretical calculation results were compared with the finite element simulation results.Thereby the effectiveness of the fatigue life prediction model is verified.

关 键 词：疲劳寿命 预测模型 航空发动机 液压管路 

分 类 号：O346.2[理学—固体力学] TB112[理学—力学]