货车铸钢侧架随机载荷谱下的疲劳寿命预估研究  

A STUDY ON FATIGUE LIFE PREDICTION OF CAST STEEL SIDE FRAME FOR FREIGHT WAGONS UNDER RANDOM LOAD SPECTRUM

作　　者：吕澎民[1] 赵邦华[1] 王明复 孟广甫 

机构地区：[1]兰州铁道学院

出　　处：《铁道学报》1994年第1期101-107,共7页Journal of the China Railway Society

摘　　要：本文以实测的转８Ａ铸钢侧架随机载荷谱为依据，采用实测的ＺＧ２３０─４５０铸钢材料的有关材料参数和Ｓ─Ｎ曲线，用局部应力─应变法加上断裂力学方法估算了该侧架的疲劳总寿命，并与名义应力法计算结果进行了比较。计算表明，两种方法所得的疲劳总寿命基本是一致的。本文还对侧架在恒幅脉动载荷作用下用局部应力─应变所得的侧架疲劳裂纹形成寿命进行了实验验证，其结果也是令人满意的。Based on the statistical random load spectrum of cast steel side frame in truck 8A and some material parameters and S-N curve of cast steel ZG230-450,the total fatigue life of the side frame is predicted by way of local stress-strain approach and fracture mechanicsmethod. The result is compared with that calculated by way of the name strain method.Calculation shows that the results got by both ways are basically the same. Besides,the fatiguecrack initiation life of the side frame calculated by way of local stress-strain method underconstant stress cycling is also tested, which has a satisfactory result.

关 键 词：铸钢 侧架 疲劳寿命 货车 

分 类 号：U272.033.1[机械工程—车辆工程]