中国机械工程2025，Vol.36Issue(9)：1916-1924,9.DOI:10.3969/j.issn.1004-132X.2025.09.002
航空燃油管路焊缝分区域建模及其对管路力学特性影响研究
Modeling of Aviation Fuel Pipe Welds in Different Regions and Its Effect on Mechanics Properties of Pipes
摘要
Abstract
Aircraft fuel lines contained various structures such as bends,branches and welded seams,which exhibiedted complex fluid-solid coupling mechanics behaviors under external loads and internal fluid coupling.The microstructural parameters of the welded areas were obtained through metallographic testing and microtensile testing,and a high-precision finite element model of the welded fuel lines with different lo-cal structures was constructed.The modal test results show that the errors between tests and simulations are less than 10%,which verify the accuracy of modelling and simulation.The effects of different branch pipe bending radii and pipe diameter ratios on the mechanics properties of the pipelines were investigated.It is found that increasing the bending radii and pipe diameter ratios may help to make the distribution of the flow velocity and pressure fields in the pipelines more uniform,and the intrinsic frequency decreases with the increase of the bending radius;and when the bending radius decreases but the pipe diameter ratio in-creases,the peak of the random vibratory stresses decreases.The applications of a fuel line model that ac-curately models welded seams to analyze the effect of local structures on the mechanics properties of the line may provide a basis for line design and optimization.关键词
相贯焊接燃油管路/精细化建模/局部结构/流固耦合振动/力学特性/模态试验Key words
coherently welded fuel line/refined modeling/local structure/fluid-solid coupling vibra-tion/mechanics property/modal test分类
航空航天引用本文复制引用
郭长虹,狄梦然,宫瀚文,权凌霄,李斌..航空燃油管路焊缝分区域建模及其对管路力学特性影响研究[J].中国机械工程,2025,36(9):1916-1924,9.基金项目
国家自然科学基金(51775477) （51775477）
