摘要
根据重型汽车的载荷特征,以11R20型号轮胎和轮毂相关标准进行了轮毂结构设计,最终选择采用二件式平底轮毂,五孔式轮辐。同时建立了钢制和铝合金轮毂的参数化模型,对结构的模态和疲劳寿命进行对比分析。研究结果表明:两种材料固有频率均远大于实际转速下频率,不会发生刚性运动和共振现象,不同材料对轮毂的固有频率并不会造成较大影响;钢制轮毂最大应力为111.190 MPa,铝合金轮毂最大应力为83.146 MPa,均在材料屈服强度以下,两种轮毂的通风孔位置产生应力集中,而铝合金轮毂的变形量远小于钢制轮毂材料,同等荷载作用下的铝合金轮毂综合受力性能较好。
According to the load characteristics of heavy trucks, the hub structure was designed based on the relevant standards of 11 R20 tire and hub, and the two-piece flat bottom hub with five-hole spoke were finally selected. At the same time, the parametric models of steel and aluminum alloy hubs were established, and the modal and fatigue life of the structure were compared and analyzed. The results showed that the natural frequency of the two materials was much higher than that at the actual speed, and there would be no rigid motion and resonance. Different materials would not have a great influence on the natural frequency of the hub. The maximum stress of the steel hub was 111.190 MPa and the maximum stress of the aluminum alloy hub was 83.146 MPa, which were all below the yield strength. There was stress concentration in ventilation holes of two kinds of hubs, while the deformation of aluminum alloy hubs was much smaller. The comprehensive mechanical properties of aluminum alloy hubs under the same load were better.
作者
伊雪飞
石磊
YI Xue-fei;SHI Lei
出处
《模具技术》
2019年第6期1-5,43,共6页
Die and Mould Technology
关键词
汽车轮毂
疲劳寿命
合金材料
模态分析
automobile hub
fatigue life
alloy material
modal analysis
