Dynamic characterization of two-stage helical gear transmission for electric vehicles considering mesh impact
LIU Xing
ZENG Zhongwei
ZHANG Xiangjun
SHI Guoyong
FU Xuezhong
Abstract：[Objective]The influence of meshing impact on the dynamic characteristics of two-stage helical gear transmission systems in electric vehicles was investigated to provide references for the design of such transmissions.[Methods]A two-stage helical gear transmission system of an electric vehicle was taken as the research object.A calculation formula for meshing impact force was derived;a 16-degree-of-freedom dynamic model was established based on the lumped mass method,and a set of dynamic differential equations considering bending-torsional-axial coupling was constructed.The Runge-Kutta method was used for solution,and the dynamic characteristics of each gear pair under different rotational speeds were analyzed.[Results]The results show that when the input speed increases from 3 000 r/min to 12 000 r/min,the peak meshing-in impact acceleration of the input-end and output-end gear pairs rises from 686.21 m/s2 and 223.35 m/s2 to 2 291.61 m/s2 and 1 131.77 m/s2,respectively.The increase of rotational speed significantly amplifies the influence of meshing-in impact on the system and aggravates the system instability,and the influence of the input-end gear pair is greater than that of the output-end one.At the same rotational speed,the input-end gear pair has a stronger influence on the meshing-in impact of the output-end gear pair,and the mutual interference frequency between the two is consistent with their own meshing frequencies.
Keywords：Two-stage helical gear transmissionMesh impactDynamic characterizationRotational speedAcceleration
Publication Date：2026-05-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 112-117 )