机械科学与技术2024，Vol.43Issue(1)：117-124,8.DOI:10.13433/j.cnki.1003-8728.20220144
动车组空心车轴应力强度因子研究
Study on Stress Intensity Factors of EMU Hollow Axles
摘要
Abstract
In order to study the stress intensity factors(SIFs)for hollow axle of EMU,the influencing factors of the axle SIFs were firstly analyzed.The finite element model for axle with crack was established,and the superposition method was used to evaluate SIFs under different loads.Then,the SIFs were calculated by using the stress extrapolation method(SEM)and displacement extrapolation method(DEM),and the calculation results were compared with that by using the shape factor formula method.Finally,a fifth-order polynomial was used to fit the shape factor function according to the general analytical formula of SIFs and calculation results via DEM.The applicability of the shape factor function and the analytical formula was verified by setting the different crack depths and loads.The results indicated the present method had certain reference value for calculating SIFs of axle under the same load mode.关键词
应力强度因子/有限元/叠加法/应力外推法/位移外推法/形状因子Key words
stress intensity factors/finite element/superposition method/stress extrapolation method/displacement extrapolation method/shape factor分类
交通工程引用本文复制引用
余海峰,吴兴文,梁树林,池茂儒..动车组空心车轴应力强度因子研究[J].机械科学与技术,2024,43(1):117-124,8.基金项目
国家重点研发计划(2018YFE0201401-01)、国家自然科学基金项目(51805450)、中国科协青年人才托举工程项目(2019QNRC001)及四川省基础研究计划(2020YJ0075) （2018YFE0201401-01）
