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针对航空发动机整机振动,建立了一种通用的复杂转子-支承-机匣耦合动力学模型.在模型中,利用有限元方法对转子和机匣系统进行建模.支承系统采用集总参数模型,计入了滚动轴承和挤压油膜阻尼器的非线性,定义了多种支承和连接方式,以适应多转子和多机匣的复杂结构建模.运用数值积分获取系统非线性动力学响应.针对两个实际的航空发动机转子实验器,建立了整机耦合动力学模型,进行了整机模态实验验证,结果表明了航空发动机整机振动耦合动力学建模方法的正确有效性.
Aiming at the vibration of whole aeroengine, a general coupled rotor-bearing-casing coupling dynamics model is established, in which the rotor and casing system are modeled by using finite element method.The support system uses lumped parameter model , The non-linearity of rolling bearing and squeeze film damper is taken into account, and a variety of support and connection methods are defined to adapt to the complex structure modeling of multi-rotor and multi-receiver. The nonlinear dynamic response of the system is obtained by numerical integration Two actual aeroengine rotor experimental apparatus, the whole machine coupling dynamics model was established, and the whole machine modal experimental verification was carried out. The results show that the aeroengine vibration-coupled dynamic modeling method is correct and effective.