完整航空双联斜齿圆柱齿轮的三维有限元动力分析

The 3-D Finite Element Dynamic Analysis of an Integrate Aeronautical Double Helical Gear

本文根据(1)文中提出的方法,在微机上计算了一具有2160个自由度的完整航空双联齿轮的前12阶固有频率及振型。通过采用不同的计算模型,研究了轴、辐板布置及尺寸对该齿轮固育频率及振型的影响。计算结果表明,轴主要影响圆柱齿轮的扭转振动频率,斜辐板布置形式不但增加了齿轮的轴向刚度,而且使整个齿轮的固有频率较同样尺寸下的直辐板齿轮的固有频率大大增加。

Based on the method presented by author in [1], the first twelve frequencies and the corresponding mode shapesof an integrate aeronautical double-gear with 2160 degrees of freedom are evaluated in this paper by a personal-computer. The effects of axle, web arrangements and sizes of the structure on the eigenpairs of the gear are studied by using different FE models. The calculating results show that axle mainly effects the tortional frequency of the gear, and the gear structure with inclined web arrangement not only can increase the axial stiffness, but also make the natural frequencies of the gear much higher than those of gear with plain web arrangement.