基于ABAQUS的转向架十字焊接接头应力集中系数分析
发布时间：2019-06-21 16:06
【摘要】：针对转向架十字焊接接头进行有限元建模,应用有限元软件ABAQUS计算不同焊趾倾角、焊趾过渡圆弧半径下接头焊趾处的应力集中系数,并通过Origin软件建立应力集中系数与几何参数(焊趾倾角、焊趾过渡圆弧半径)的关系方程式。结果表明:应力集中在十字焊接接头焊趾处比较大,焊趾倾角θ和焊趾过渡圆弧半径r对十字接头应力集中系数Kt的大小有显著影响;对于相同的焊趾倾角θ,应力集中系数Kt随着焊趾过渡圆弧半径r的增大而逐渐减小,随着倾角θ的增大,过渡圆弧半径r对应力集中系数Kt的影响也不断增大;焊趾过渡圆弧半径r相同的情况下,应力集中系数Kt随着倾角θ的增大而增大,随着过渡圆弧半径r的不断增大,倾角θ对应力集中系数Kt的影响不断减小;应力集中系数关系方程对于焊趾处应力集中的改善以及转向架超声疲劳十字接头的设计均具有指导意义。
[Abstract]:The finite element modeling of the cross welded joint of bogie is carried out. The stress concentration coefficient at the welding toe under different welding toe inclination angle and welding toe transition arc radius is calculated by finite element software ABAQUS, and the relationship equation between stress concentration coefficient and geometric parameters (welding toe inclination angle, welding toe transition arc radius) is established by Origin software. The results show that the stress concentration is large at the welding toes of the cross welded joint, and the dip angle of the welding toe and the radius of the transition arc of the welding toe have a significant effect on the stress concentration coefficient Kt of the cross joint, and for the same dip angle of the welding toe, the stress concentration coefficient Kt decreases gradually with the increase of the radius of the welding toe transition arc r, and the influence of the transition arc radius r on the stress concentration coefficient Kt increases with the increase of the inclination angle theta. When the radius of welding toe transition arc is the same, the stress concentration coefficient Kt increases with the increase of dip angle theta, and the influence of dip angle theta on stress concentration coefficient Kt decreases with the increase of transition arc radius r, and the stress concentration coefficient relation equation is of guiding significance for the improvement of stress concentration at welding toes and the design of ultrasonic fatigue cross joint of bogie.
【作者单位】： 华东交通大学机电工程学院;
【基金】：国家自然科学基金(51365014)
【分类号】：TG457.11
本文编号：2504199
[Abstract]:The finite element modeling of the cross welded joint of bogie is carried out. The stress concentration coefficient at the welding toe under different welding toe inclination angle and welding toe transition arc radius is calculated by finite element software ABAQUS, and the relationship equation between stress concentration coefficient and geometric parameters (welding toe inclination angle, welding toe transition arc radius) is established by Origin software. The results show that the stress concentration is large at the welding toes of the cross welded joint, and the dip angle of the welding toe and the radius of the transition arc of the welding toe have a significant effect on the stress concentration coefficient Kt of the cross joint, and for the same dip angle of the welding toe, the stress concentration coefficient Kt decreases gradually with the increase of the radius of the welding toe transition arc r, and the influence of the transition arc radius r on the stress concentration coefficient Kt increases with the increase of the inclination angle theta. When the radius of welding toe transition arc is the same, the stress concentration coefficient Kt increases with the increase of dip angle theta, and the influence of dip angle theta on stress concentration coefficient Kt decreases with the increase of transition arc radius r, and the stress concentration coefficient relation equation is of guiding significance for the improvement of stress concentration at welding toes and the design of ultrasonic fatigue cross joint of bogie.
【作者单位】： 华东交通大学机电工程学院;
【基金】：国家自然科学基金(51365014)
【分类号】：TG457.11
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