Analytical modeling and simulation on lateral mechanical characteristics of high-speed train traction motor hanging leaf spring

Abstract

In this paper, using the theoretical analysis method, according to the actual structure of the hanging leaf spring of the traction motor mounted on the frame, the lateral force model of the hanging leaf spring of the traction motor was established. Then, through theoretical deduction, the deformation analytical calculation formula and the stress analytical calculation formula of the hanging leaf spring were established. The correctness of the leaf spring’s lateral force model was established and its deformation and stress analytical formulae were verified using ANSYS finite element analysis software. Based on this, according to the deformation analytical formula and the stress analytical formula of the leaf spring established, the influence of the main structural parameters on the mechanical characteristics of the leaf spring was discussed, and the reliability of the analytical analysis method of the lateral mechanical characteristics of the traction motor hanging leaf spring was verified by the loading–unloading test. The results show that the deformation and the load of the leaf spring change linearly. The changes of leaf spring’s stress at different positions can be considered as being composed of three sections: a linear change section in the root, a nonlinear change section in the middle, and a nonlinear change section in the end. In the structural parameters, the end thickness [Formula: see text] has the greatest influence on the stiffness and the stress of the leaf spring, and the maximum thickness of the leaf spring eye [Formula: see text] has the least influence on the stiffness and the stress of the leaf spring. The influence degree of other parameters on the stiffness of the leaf spring is [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] in order, and the influence degree on the stress of the leaf spring is [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] in order. In addition, when the root thickness [Formula: see text] is greater than a certain value, the maximum stress point of the leaf spring appears at the end position [Formula: see text]. This study can provide a useful reference for the intelligent forward design and the rapid analysis of the mechanical characteristics of high-speed train traction motor hanging leaf spring.