涡桨发动机剩余不平衡量相位组合对转子振动响应的 影响规律

Effect of Phase Combination of Residual Unbalance on Rotor Vibration Response of Turboprop Engines

中文关键词:  动力特性  转子动力学  有限元法  装配技术  相位组合  涡桨发动机

英文关键词:dynamic characteristics  rotor dynamics  finite element method  assembling technology  phase combination  turboprop engine

中文摘要:

      为解决涡桨发动机部件动平衡合格但整机振动超标的问题，建立了转子系统动力特性有限元分析模型，分析了转子系 统临界转速和不平衡响应特性，研究了剩余不平衡量相位组合对转子振动响应的影响规律。基于分析结果，改进了转子装配工艺 流程并开展了整机试验验证。结果表明：所建立的计算分析模型能反映转子系统的真实状况；剩余不平衡量的大小、轴向分布以 及相位均会影响多面动平衡转子系统的振动响应，仅改变剩余不平衡量的相位组合即可大幅降低整机振动幅值；剩余不平衡量等 比例缩放对最优相位组合的分布规律影响较小，不等比例缩放会导致最优相位组合分布规律大幅改变。改进后的转子装配工艺 流程有效率达到96.7%，平均减振幅度超过40%，对减小转子在工作转速下的振动响应有显著效果，对整机减振具有十分重要的 意义。

英文摘要:

      In order to solve the problem of excessive vibration of the turboprop engine assembled using components that meet dynamic balance requirements, a finite element model of the rotor system was established. The critical speed and unbalance response characteristics of the rotor system were analyzed, and the influence of phase combination of residual unbalance on rotor vibration response was studied. Based on the analysis results, the rotor assembling process was improved and whole engine verification tests were conducted. The results show that the established model can reflect the actual condition of the rotor system. The magnitude, axial distribution, and phase of the residual unbalance can all impact the vibration response of the multi-plane balanced rotor system. Changing only the phase combination of the residual unbalance can significantly reduce the whole engine vibration amplitude. The proportional scaling of the residual unbalance has little effect on the distribution of the optimal phase combination, whereas non-proportional scaling of the residual unbalance can greatly change the distribution of the optimal phase combination. The effective rate of the improved rotor assembly process reaches 96.7%, with an average vibration reduction of over 40%, which has a significant effect on reducing the rotor vibration response at operating speed and is of great importance for whole engine vibration reduction.