摘要
为了研究不同工况下链轮力学特性和疲劳寿命,采用Ansys Workbench建立链传动系统的动力学模型,并进行瞬态动力学仿真;采用n Code Glyp Works中的Rainflow模块对提取危险区域最大等效应力时间历程进行雨流计数、载荷外推和叠加;采用n Code Glyp Works中的Stress Life模块对链轮进行疲劳寿命计算和敏感性分析。分析得到不同工况下链轮等效应力云图和最大等效应力时间历程、外推和叠加后雨流直方图、链轮损伤直方图以及不同输入参数下的链轮最小疲劳寿命曲线图和柱形图。研究结果表明:该型号链轮具有良好的力学性能,链轮的最小疲劳寿命约为110天,过载、残余应力、表面质量和平均应力修正方法均对链轮的使用寿命具有明显的影响。
To study the mechanical properties of the sprocket under the different conditions, the dynamic model of the chain system is established and analyzed using ANSYS Workbench. To analyze the fatigue life and fatigue sensitivity of the sprocket, nCode GlypWorks is used to handle the load and calculate the fatigue life of the sprocket. The rain-flow counting, the load extrapolation and superposition of the maximum equivalent stress time history of the dangerous area of the sprocket are executed using Rainflow module in nCode GlypWorks. The analysis of the fatigue life and fatigue sensitivity is executed using Stress Life module in nCode GlypWorks. The equivalent stress cloud pictures and the maximum equivalent stress time history of the sprocket, rain-flow histograms after the extrapolation and superposition, damage histogram of the sprocket, and the minimum fatigue life curves and columnar diagrams of the sprocket under the different inputted parameters are obtained. The results show that the type sprocket has a good mechanical property; the minimum fatigue life of the sprocket is about 110 days; the overload, residual stress, surface quality, and mean stress correction method have an obvious influence on the service life of the sprocket.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第2期328-336,共9页
Journal of Mechanical Strength
基金
国家863项目(2013AA06A412)
国家科技支撑计划项目(2013BAH12F01)
教育部博士点基金(20132121120011)
材料腐蚀与防护四川省重点实验室开放基金资助(2014CL18)资助~~
关键词
链轮
不同工况
力学特性
疲劳寿命
载荷谱
疲劳敏感性
Sprocket
Different conditions
Mechanical property
Fatigue life
Load spectrum
Fatigue sensitivity
