摘要
采用有限元法对汽车前舱盖进行开关疲劳寿命预测分析.基于Abaqus/Expicit,采用直接积分法对前舱盖进行瞬态响应分析,得到前舱盖在关闭过程中的应力时间历程;运用雨流计数法得到离散的应力循环,采用平均应力修正法得到当量应力谱;根据Miner线性疲劳累积损伤理论预测前舱盖疲劳寿命和风险位置.优化改进后的前舱盖结构通过试验验证.
The opening and closing fatigue life of an automobile hood is predicted and analyzed by finite element method. Based on Abaqus/Explicit, the transient response is analyzed for the hood using direct integration method, and the time history of hood stress during closing is obtained; the discrete stress cycles are obtained by rain-flow counting method, and the equivalent stress spectrum is achieved by mean stress modification algorithm; according to the Miner linear fatigue damage cumulative theory, the fatigue life and the risk region of the hood are predicted. The optimized hood structure is verified by test.
出处
《计算机辅助工程》
2016年第1期15-18,24,共5页
Computer Aided Engineering
关键词
汽车
前舱盖
有限元法
直接积分法
瞬态响应
疲劳寿命
automobile
hood
finite element method
direct integration method
transient response
fatigue life
