中文摘要：

为提高高速电主轴工况下的动态性能,建立一个电主轴热-电-机耦合动力学模型.该模型包含球轴承热机耦合模型、热模型和考虑电磁不平衡力（Unbalanced electromagnetic force,UEF）影响的转轴动力学模型等子模型,各子模型之间基于轴承配置相互影响.确定系统主要设计参数（Design parameters,DVs）,设计电主轴多场耦合动力学计算流程,在型号170MD15Y20电主轴上进行相关试验对耦合模型和计算模型进行验证,并分析DVs对系统固有频率的灵敏度.理论和试验结果表明所建模型和能准确预测高速电主轴多场耦合动力学行为并揭示其耦合关系,此外获取了不同轴承配置下DVs对系统前两阶固有频率的灵敏度.

英文摘要：

To improve the dynamic behaviors of high speed motorized spindles under work conditions,a dynamic thermo-electro-mechanical coupled model for motorized spindles is constructed.The integrated model consists of a thermo-mechanical bearing model,a thermal model and a dynamic shaft model with unbalanced electromagnetic force.These sub-models interact on each other based on the bearing configuration.The main design parameters （DVs） ofthe system are identified and a design flow chart is developed.Therelated tests are carried out to validate the integrated model and design flow chart,anda design sensitivity analysis of the DVs is presented.The good agreement between the theoretical results and the experimental data indicates that the proposed model is capable of accurately predicting the thermo-electro-mechanical properties of motorized spindles and the coupled relationship among them.Meanwhile,the sensitivities of the DVs to the first two natural frequencies of the system with different configurations are obtained.