考虑LTCA技术的功率双分支轮系动态特性分析  

Dynamic Characteristics Analysis of Power Double Branch Gear System Based on the LTCA Technology

作　　者：董皓[1] 方舟[1] 段玲玲 

机构地区：[1]西安工业大学机电学院,西安710021 [2]陕西华陆化工环保有限公司,西安710025

出　　处：《噪声与振动控制》2016年第1期10-14,44,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51505361);陕西省教育厅专项科研计划项目(15JK1338);陕西省特种加工重点实验室开发项目(2014SZS20-K04)

摘　　要：双路功率分支传动系统较多应用于航空系统传动装置中,为了揭示其动态振动机理,建立该系统的动态力学模型。采用承载接触分析(LTCA)技术计算齿轮副时变啮合刚度激励;利用集中质量法建立弯扭耦合的动力学微分方程,进行消除刚体位移和量纲归一化处理,采用数值解法,得到系统的时域-频域响应,给出动载系数与输入转速的函数关系。结果表明:系统动态特性受到输入转速的影响较大;啮合阻尼的增大,可以降低临界转速附近的动载荷;实验和理论具有较好的一致性。为进一步对该系统的优化设计提供理论基础。Double branch power split transmission system is widely used in aerospace engineering. In order to find the dual dynamic vibration characteristics of the power split transmission system, the dynamic mechanical model of the system was established. First of all, the actual meshing process of each gear pair was simulated using the technique of the loaded tooth contact analysis (LTCA), and the time-varying mesh stiffness excitation was obtained, which can improve the numerical precision. Then, by using the lumped mass method, the bending-torsion coupled three dimensional dynamic model of the dual power-split transmission system was established, and the corresponding dimensionless equations were deduced by eliminating rigid-body displacement and using dimensional normalization. Finally, the responses of this system in frequency domain and time domain were obtained, and the dynamic load change characteristics of each gear pair were analyzed. The results show that the dynamic characteristics of the system are greatly influenced by the input speed. Increasing the mesh damping can reduce the dynamic load near the critical speed. The experiment and theory are in good agreement. This work may provide a theoretical basis for the optimization design of the system.

关 键 词：振动与波 承载接触分析 时变啮合刚度 弯扭耦合 动载系数 阻尼 

分 类 号：TH132.4[机械工程—机械制造及自动化]