Parametric Modeling of NGW Planetary Gear Train Based on APDL

Abstract

In this study, a 3D parametric modeling method based on APDL is proposed to address the complexity and lack of compatibility of
helical gears modeling in the ANSYS framework. Through the derivation of involute right-angle coordinate equations and tooth root transition
curve equations, combined with cyclic statements and spline fitting technology, the automatic generation of tooth profile curves is realized; the
developed user interface supports the flexible input of key parameters, such as helix angle and ANSYS framework. Through the derivation of
involute right-angle coordinate equations and tooth root transition curve equations, combined with cyclic statements and spline fitting technology, the automatic generation of tooth profile curves is realized; the developed user interface supports the flexible input of key parameters,
such as helix angle and standard modulus, and integrates the functions of local mesh refinement and dynamic parameter interaction, so that
the modeling efficiency is improved by about 40% compared with the traditional CAD method. The finite element static analysis of the planetary gear system shows that the uniformity error of the load distribution of the four planetary wheels is less than 5%, and the deviation of the
maximum contact stress from the theoretical value is less than 3%, which verifies the high-precision characteristics of the model. The method
provides an efficient technical framework for dynamic load optimization, multi-physical field coupling analysis, and industrial-grade highfidelity simulation of helical gears by parametrically controlling the tooth shape generation process, and the results can be directly applied to
the reliability design and performance regulation of complex gear systems.