摘要
针对某自卸车长时间使用后副车架局部出现疲劳裂纹的情况,以该重型自卸车副车架为原型建立计算模型,利用ABAQUS有限元软件对该副车架的不同工况进行静力分析。结果表明:在3种典型工况下,副车架产生的等效应力比较接近,扭转工况时产生的等效应力最大,为270.1 MPa,安全系数为1.26,满足强度要求;但车架前中部管梁处位移比较大,应力集中较明显,长时间使用后该处容易产生疲劳断裂。模拟分析数据可为重型自卸车副车架优化改进设计提供理论依据。
For the situation of local fatigue crack appeared in the sub-frame of a dump truck after prolonged use,a calculation model is established to carry out static analysis to the sub-frame in different conditions by ABAQUS finite element software. In three typical working conditions,the results show that equivalent stresses generated by sub-frame are close to each other,with the maximum at 270. 1 MPa in twisting condition,and the safety factor is 1. 26,which meets the strength requirements. But the displacement of tube beam in the middle of the front frame is obvious with high stress concentration. Fatigue fracture may occur after prolonged use. The data of simulation analysis can provide theory and technology guidance to optimization and improvement design of heavyduty dump truck sub-frame.
出处
《山东交通学院学报》
CAS
2015年第4期13-16,共4页
Journal of Shandong Jiaotong University
基金
国家自然科学基金项目(111021181)
辽宁省"百千万"人才基金资助项目(2011921048)
关键词
副车架
疲劳裂纹
静力分析
优化改进
sub-frame
fatigue crack
static analysis
optimization and improvement
