论文部分内容阅读
采用大型通用商业分析软件Abaqus及Ansys,计算840D车轮在典型工况下的应力分布。计算分析表明:在坡道制动、机械载荷和停车制动3种典型工况作用下车轮辐板孔外侧处于受压状态,内侧处于受拉状态,而且应力幅值较大,是疲劳薄弱点;坡道制动工况与机械载荷工况的组合作用,是车轮辐板孔边产生高应力的主要因素;在相同制动工况下,车轮辐板孔边应力随着轮辋厚度的减小而增大,随着辐板孔向轮辋偏移量增大而增大;机械载荷工况与坡道制动工况的组合作用是导致各种车轮辐板孔疲劳裂纹萌生的主要原因;机械载荷工况与停车制动工况的组合作用对车轮辐板孔边萌生疲劳裂纹的影响相对较小。
Using large common commercial analysis software Abaqus and Ansys, the stress distribution of 840D wheel under typical working conditions was calculated. The calculation and analysis show that under the condition of ramp braking, mechanical load and parking brake, the outer part of the spoke plate web is under compression and the inner part is under tension, and the stress amplitude is large, which is the point of fatigue weakness The combined effect of the ramp braking condition and the mechanical load condition is the main factor of the high stress generated at the hole edge of the spoke plate. Under the same braking condition, the stress at the hole edge of the spoke plate decreases with the decrease of the rim thickness And increases with the offset of the web hole to the rim increases; the combination of mechanical load conditions and ramp braking conditions is the main cause of fatigue crack initiation of a variety of wheel spoke plate holes; mechanical The combined effect of the load condition and the parking brake condition has a relatively small influence on the fatigue crack initiation at the hole edge of the spoke plate.