中文摘要：

针对转盘轴承的薄壁大型环状结构特性,应用ABAQUS软件建立内圈沟道局部损伤有限元分析模型,基于显式动力学有限元算法,对转盘轴承的运转过程进行数值模拟仿真,获得了不同尺寸缺陷下的振动响应脉冲波形,探索了损伤尺寸对转盘轴承的影响机制。研究结果表明：有限元仿真分析可以准确地反映出转盘轴承沟道表面的局部损伤,在相同条件下,缺陷长度的增加对转盘轴承运转的影响最大,而高度的影响可以忽略不计;分析结果对转盘轴承沟道损伤监测系统构建具有重要指导意义。

英文摘要：

Aiming at thin- wall and large size circular structure characteristics of slewing bearings,a finite element analysis model for local defect on inner ring raceway is built by using ABAQUS. The operating process for slewing bearing is numerically simulated based on explicit dynamic finite element algorithm. The pulse waveforms of vibration responses are obtained under different defect sizes,and the influencing mechanism of damage sizes on slewing bearing is explored. The research results show that the finite element simulation analysis can accurately reflect local damage on raceway surface of slewing bearing. The increase of defect length has the largest effect on operation of slewing bearing and the effect of height is negligible under the same conditions. The analytical results have important guiding significance in developing raceway damage monitoring system for slewing bearing.