.... Design/methodology/approach Based on the lumped mass method, the time-varying meshing stiffness and symmetry error are introduced to establish a dynamic model of herringbone gear bending-torsion-shaft coupling, and the load-sharing performance test is carried out on the herringbone gear test bench...

.... Findings The research results show that the equal tooth number model has greater meshing stiffness and smaller fluctuation than the constant tooth width model, which shows that increasing the meshing stiffness of the system is beneficial to reduce system fluctuation and improve system stability...