某型航空发动机低压压气机转子二级叶片/盘应力分析

为了排除某型航空发动机低压压气机转子二级叶片故障,采用新的改型方案:将叶片根部加厚10%,从叶根到叶尖加厚程度逐渐减小,叶尖保持原来厚度不变;同时加强叶片凸耳。研究了改型前后叶片/盘的力学性能、校核了其强度及对盘的影响。结论是:改型前后叶片/盘上的应力分布规律无明显变化,应力大小符合设计标准,强度符合设计要求。

Stress Analysis for the Second Stage Rotor Blade and Disc of a Certain Aero-engine Low Compressor

In order to avoid crack and fracture of the second stage rotor blade of a certain aero-engine low compressor,a new remodel plan is used.That is to thicken the rotor blade and to strengthen the flange.The mechanic properties of the blade and the disc before and after being remodeled are studied in this paper so as to verify the intensity and its influence on the disc.The conclusion is that the stress distributions on the blade and on the disc are not changed and,the magnitudes and the intensity of the stress all meet the design standards.These jobs provide a theoretical basis for replacing the unimproved blades by the improved ones and a theoretical foundation of preventing the blade and the disc from cracking and fracturing.