摘要
基于先进航空发动机承力框架的结构与力学特征,通过理论分析与仿真计算验证了高隔振性承力框架结构动力学设计方法。通过对承力结构刚度/质量分布及几何构形突变的优化设计,提高转子支承结构在宽频域内的机械阻抗,实现在转子工作转速范围内的高隔振性。根据承力结构刚度/质量分布对隔振性的影响,采用折返式非连续结构,设计并搭建了转子-承力框架试验系统,通过试验进一步验证了高隔振性承力框架设计方法。试验结果表明:在承力结构中采用非连续性设计可在宽频域内对不同位置支点处激励具有良好的隔振效果。
Based on the structural and dynamic characteristics of advanced aero-engine supporting frames,the design method of high vibration isolation supporting frames is verified by theoretical analysis and simulation calculation. The structural mechanical impedance in wide frequency band is increased and high vibration isolation within rotor working speed range is achieved by the optimized design of stiffness/mass distribution and configuration break in supporting structure. According to the effect of structural stiffness/mass distribution on vibration isolation,the rotor-supporting frame experimental apparatus is designed and established in folded discrete structure,and the high vibration isolation supporting frame design method is further verified by the experiment. The experimental results show that the discrete design in supporting structure possesses good vibration isolation effect to the excitation on different bearing positions in wide frequency band.
作者
洪杰
杨振川
王永锋
马艳红
HONG Jie;YANG Zhenchuan;WANG Yongfeng;MA Yanhong(School of Energy and Power Engineering,Beihang University,Beijing 100083,China;Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100083,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2019年第1期10-17,共8页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金(51575022
51475021)
航空科学基金(20142151024)~~
关键词
承力框架
隔振性
刚度/质量分布
非连续性
机械阻抗
supporting frame
vibration isolation
stiffness/mass distribution
discreteness
mechanical impedance
