Abstract: In order to fully understand the effects of non-metallic inclusions in gear materials(herein after referred to as "inclusions") on contact damage evolution of wind turbine gears, the configuration force theory, which was used to describe the change of system energy, was introduced to describe the contact damage evolution of gears. Besides, the effects of inclusions depth, size and arrangement on the key contact bearing areas of gears were discussed. The results show that the inclusions affect the stress distribution and damage forms of gear contact damage, resulting in different areas of material spalling and the formation of failure areas. The damage model based on the configurational force theory may accurately describe the contact damage problems of wind turbine gears containing inclusions, which provides a new method for the subsequent failure analysis and fatigue life prediction of the gears.

Key words: wind turbine gear, gear contact, configurational force, inclusion, damage evolution

摘要： 为更全面地探究齿轮材料内非金属夹杂物（以下简称“夹杂物”）对风电齿轮接触损伤的影响，引入可以描述系统能量变化的构型力理论表征齿轮接触损伤演化，并探讨了夹杂物深度、尺寸以及排列方式对齿轮接触承载关键区域的影响。研究结果表明，夹杂物会改变齿轮接触损伤的应力分布和损伤形式，导致不同面积的材料剥落和失效区域形成。基于构型力理论的损伤模型可以准确描述风电齿轮含夹杂物接触损伤问题，为后续齿轮失效分析和疲劳寿命预测提供了新方法。

关键词: 风电齿轮, 齿轮接触, 构型力, 夹杂物, 损伤演化