随机振动下管径壁厚对航空液压管路的疲劳寿命的影响
Influence of Pipe Diameter and Wall Thickness on Fatigue Life of Aviation Hydraulic Pipeline under Random Vibration
张凌云 1王永健 1杨镇 1何建冬 1石绍秋2
作者信息
- 1. 沈阳航空航天大学 国防重点学科实验室,辽宁 沈阳 110121
- 2. 国营芜湖机械厂,安徽 芜湖 241000
- 折叠
摘要
根据目前存在由流量设计的不同管径液压管路的疲劳寿命达不到要求的情况,不同管径和壁厚的航空液压导管在随机振动工况下进行疲劳寿命的影响分析.将管路模型简化处理并进行模态分析和随机振动响应分析,最后结合疲劳损伤累积理论和材料的S-N曲线数据得出不同管径壁厚下的疲劳寿命时间.结果表明:当管径和壁厚越大时,对疲劳寿命时间的影响越大.
Abstract
According to the fact that the fatigue life of hydraulic pipes with different diameters designed by flow rate can not meet the requirements,the influence of random vibration on the fatigue life of aviation hydraulic pipes with different diameters and wall thickness was analyzed.The pipe model was simplified.The modal analysis and random vibration response analysis were carried out.The fatigue life time under different pipe diameters and wall thickness was obtained by combining fatigue damage accumulation theory and S-N curve of material.The results show that the larger the pipe diameter and wall thickness,the greater the impact on the fatigue life time.
关键词
液压管路/有限元方法/随机振动/功率谱密度/疲劳寿命Key words
hydraulic pipeline/finite element method/random vibration/power spectral density(PSD)/fatigue life引用本文复制引用
出版年
2024
NETL
NSTL
万方数据