汽车传动系高速变速耐久性断裂部件试验研究

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摘要为研究某载货汽车高速路耐久性变速强化试验阶段出现的传动系部件断裂问题，利用非接触式转矩遥测仪实车测试了传动轴转矩、车速等相关数据，应用LMS-TecWare疲劳载荷处理软件计算传动轴正负转矩产生的疲劳损伤分布载荷谱，并据此分析断裂故障产生机理。高速路五种工况循环变速试验结果表明，奇数升降挡工况三中，3挡减1挡时出现了所有工况最大“反拖”负向冲击转矩，由此产生的扭转应力超过了部件屈服极限而发生局部塑性变形，引起永久性损伤和裂纹扩展，试验每循环一次产生的疲劳损伤为2.3565×10-7，随着试验循环次数的增加累积损伤也随之增大，经一定次数循环变速试验传动系部件最终发生低周疲劳断裂。

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	门玉琢1
	于海波2
	刘博1
	李明达1

关键词 ：汽车传动系, 变速试验, 断裂, 转矩

Abstract：In order to study the powertrain components fracture occurred in the variable-speed durability enhancement phase, the non-contact torque telemeter is used to make real vehicle test of test drive shaft torque, speed and other related data. LMS-TecWare fatigue load processing software is used to calculate the fatigue industry distribution loading spectrum and thus analyze the fracture failure mechanism. The variable-speed circulation test of five kinds of working conditions showed that in the odd lifting condition, in the case of the 3rd gear 1 less, the maximum "reversing drag" negative impact torque occurred. The torsional stress excelled the part yield limit and result in local plastic deformation, causing permanent damage and crack extension. Test the fatigue facture of each circulation is 2.3565×10-7. The accumulated damage increases with the increase of number of circulation times. The cycle variable speed powertrain parts finally had low fatigue fracture.

Key words： powertrain variable-speed test fracture torque

收稿日期: 2015-09-28 出版日期: 2016-11-25

引用本文:

门玉琢1, 于海波2, 刘博1，李明达1. 汽车传动系高速变速耐久性断裂部件试验研究[J]. 振动与冲击, 2016, 35(23): 95-99.
Men Yuzhuo1, Yu Haibo2, Liu Bo1, Li Mingda1. Experimental Study on Durability Fracture Behavior of Powertrain Components. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(23): 95-99.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I23/95

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