某钛合金宽弦空心风扇叶片共振特性仿真分析  

Simulation Analysis of Resonance Characteristics of Blades of Titanium Alloy Wide-Chord Hollow Fan

作　　者：王宪[1] 张昕喆 张翔 李国举 WANG Xian;ZHANG Xin-zhe;ZHANG Xiang;LI Guo-ju(School of Aerospace Engineering,Zhengzhou University of Aeronautics,Zhengzhou Henan 450046,China;School of Aero Engine,Zhengzhou University of Aeronautics,Zhengzhou Henan 450046,China)

机构地区：[1]郑州航空工业管理学院航空宇航学院,河南郑州450046 [2]郑州航空工业管理学院航空发动机学院,河南郑州450046

出　　处：《计算机仿真》2024年第10期48-53,486,共7页Computer Simulation

基　　金：国家自然科学基金青年项目(52206059);河南省科技攻关计划项目(212102210109,202102210151,222102240028)。

摘　　要：宽弦空心风扇叶片特有的空腔及加强筋结构,在大幅减轻叶片重量,降低整机载荷的同时,也更易使叶片在高速旋转过程中产生共振现象。为有效规避共振引起的叶片疲劳断裂、振动失效等问题,一般需要对叶片在不同转速下的共振特性进行系统分析。为此,采用有限元方法对某型号航空发动机钛合金宽弦空心风扇叶片在不同转速下的强度和模态进行了仿真分析,并借助Campbell共振图进一步对其频率裕度进行了校核。研究结果表明:靠近叶片前缘的加强筋最易受共振影响而发生振动形变,转速在2900r/min-3800r/min区间时叶片具有良好的频率裕度。The unique cavity and stiffener structure of wide-chord hollow fan blades not only greatly reduce the weight of the blade and the load of the whole machine,but also more likely to make the blade produce resonance phenomenon in the process of rotation.In order to avoid blade fatigue fracture and vibration failure caused by resonance,it is essential to conduct a systematically analysis with respect to the resonance characteristics of blades at different speeds.To this end,the finite element method was used in this paper to simulate the strength and mode of a type of aero-engine titanium alloy wide-chord hollow fan blade at different speeds,and the frequency margin was further calibrated by combining with Campbell resonance diagram.The results show that the stiffener near the leading edge of the blade is most susceptible to vibration deformation due to resonance,and the blade has a good frequency margin when the rotational speed is between 2900r/min-3800r/min.

关 键 词：宽弦空心风扇叶片 强度分析 模态分析 频率裕度 有限元仿真 

分 类 号：TP232.4[自动化与计算机技术—检测技术与自动化装置]