Influence of Primary Spring Stiffness on Strength of C0 Bogie Frame
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摘要: 为了合理地确定中间轴的一系弹簧刚度,研究了2种不同边界条件——弹簧约束和力约束下构架部分节点的应力,分析了中间轴一系弹簧在不同刚度和不同竖曲线下对构架部分节点应力的影响,并探讨了C0转向架构架应力重新分布现象.计算结果表明,C0转向架构架有限元计算模型的约束条件必须保证3根轴的轴质量相等;中间轴一系弹簧的垂向刚度比端轴的垂向刚度小时,构架应力分布更为合理.Abstract: In order to determine the reasonalbe stiffness of middle-axle primary spring,the distribution of stresses in C0 bogie frame was investigated with FEM(finite element method) based on two kinds of boundary conditions,i.e.,spring constraint and force constraint.The influence of middle-axle primary spring on stresses of partial key nodes was analyzed under different vertical curves and vertical stiffness.In addition,the re-distribution of stresses in C0 bogie frame was discussed.The numerical result shows that the constraint conditions in a finite element model for C0 bogie frame must ensure that the three axles have the same mass,and a reasonable distribution of stresses in C0 bogie frame can be obtained when the vertical stiffness of middle-axle primary spring is smaller than that of the two end-axles.
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Key words:
- C0 bogie /
- primary spring stiffness /
- bogie frame /
- strength
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