基于模态分析的变速箱齿轮轴尺寸优化

摘要

为了提高某汽车变速箱输出齿轮轴的前五阶固有频率，避免其发生共振，采用参数化建模方法和Abaqus软件对齿轮轴进行模态分析，获取其固有频率和振型，通过Isight优化软件集成Pro/E和Abaqus，采用自适应模拟退火算法对齿轮轴的轴颈直径进行优化。优化之后，该齿轮轴的低阶固有频率有所提高，其固有频率在激励频率的范围之外，避免了其发生共振。%Aiming at improving inherent frequencies of the first 5 modes of an automobile transmission gear shaft and avoiding resonance,this study adopts parametric modeling method and Abaqus software to conduct modal analysis of the gear shaft,then obtains the inherent frequencies and vibration mode. Based on Isight opti-mization software which integrates Pro/E and Abaqus,the adaptive simulated annealing algorithm is adopted to optimize the diameter of shaft neck. After optimization,the low inherent frequencies are improved in order to avoid resonance,which is outside the range of excitation frequency.