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为研究某型航空发动机机匣的包容性,以该发动机三级机匣为对象,模拟真实叶片与真实机匣模型的撞击过程,分析发动机转子转速在最低速和最高速下该机匣的包容性.结果表明,在发动机转子达到最高速时机匣出现非包容事件,叶片与机匣撞击产生的部分碎片飞出机匣.对机匣外侧缠绕凯夫拉材料和钛合金材料时机匣的包容性进行仿真和比较,发现凯夫拉材料能很好地吸收部分撞击能量,避免内层机匣出现大的变形,而钛合金材料比凯夫拉材料具有更好的包容性.
In order to study the inclusiveness of a certain type of aero-engine casing, the impact process of a real blade and a true casing model is simulated with the third-stage casing of the engine, and the tolerance of the casing of the engine rotor at the lowest speed and the highest speed is analyzed The results show that when the engine rotor reaches the maximum speed, the casing will be incapacitated, some of the fragments produced by the impact between the blade and the casing will fly out of the casing, and the casing’s tolerance when the Kevlar and titanium alloy materials are wound around the casing Simulation and comparison show that Kevlar material can absorb some of the impact energy well and avoid large deformation of the inner casing, while the titanium alloy material has better compatibility than Kevlar material.