Objective To reduce the stress level of the whole machine caused by the engine vibration and improve vibration environment of whole machine. Methods In view of the installation layout of a certain type of aircraft engine, a set of tilted rubber isolator was designed, and its vibration isolation effect was studied. The mechanical model of the vibration isolation system composed of the engine false parts, the vibration isolation device and the engine mounting frame was established. The natural frequency and the vibration isolation efficiency of the vibration isolation system were calculated by using the finite element method. Results The response curves showed that at above 40 Hz, the inclined rubber isolation system obtained very good isolation effects. Conclusion The design of the vibration isolation device meets the technical requirements of the system, and can provide the theoretical basis for the development of the vibration isolation system of the aircraft engine.%目的 降低飞机由发动机振动引起的全机振动应力水平,改善全机振动环境.方法 针对某型飞机发动机安装布局,设计一组斜置式橡胶隔振器,研究其隔振效果.建立由发动机假件、隔振装置及发动机安装架组成的隔振系统力学模型,利用有限元方法对隔振系统动态特性进行仿真,计算出其固有频率和隔振效率.结果 从响应力曲线可以看出,在40 Hz以上橡胶隔振系统起到了非常好的隔振效果.结论 所设计的隔振装置满足系统技术要求,斜置橡胶隔振系统起到了非常好的隔振效果,为此类飞机发动机隔振安装系统的研制提供理论依据.
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