大功率涡桨发动机隔振系统设计与试验研究  

Design and experimental study on vibration isolation system for high power turboprop engine

作　　者：董万元[1] 王建强[1] 陈永辉[1] 陈春兰[1] 王会利[1] Dong Wanyuan;Wang Jianqiang;Chen Yonghui;Chen Chunlan;Wang Huili(Aircraft Strength Research Institute of China,Xi'an 710065 China)

机构地区：[1]中国飞机强度研究所三十二室,西安710065

出　　处：《飞行器强度研究》2021年第3期54-60,共7页Aircraft Strength Research

摘　　要：针对涡桨飞机飞行中发动机振动剧烈的问题,以降低发动机振动向飞机机体的传递为目的,基于橡胶隔振理论设计一种全尺寸大功率涡桨发动机隔振系统。再以刚性边界支撑条件下力的传递率为隔振性能评价准则,设计涡桨发动机隔振性能试验系统,通过试验方法研究不同激励对隔振系统隔振性能的影响。试验研究结果表明:对发动机在70Hz处不同载荷峰值的一阶激励,隔振效率达到95%以上;对发动机在15Hz~2000Hz内不同均方根值的随机激励,隔振效率达到75%以上;由相位差法测试得到系统的损耗因子大于2.2,该隔振系统具有优良的阻尼性能。通过本研究可以为涡桨发动机隔振系统设计与性能验证提供技术支撑。Aiming at the problem of severe vibration of turboprop aircraft engine in flight,a high-power turboprop engine vi­bration isolation system was designed based on rubber vibration isolation principle to reduce the transmission of engine vibra­tion to the airframe.Then,using the force transmissibility under the condition of rigid boundary support as the evaluation cri­terion of vibration isolation performance,the performance verification test platform of the vibration isolation system is designed,and the influence of different excitation on the vibration isolation performance of the engine vibration isolation system is studied by using the experimental method.The experimental results show that the vibration isolation efficiency of the en­gine under the first-order excitation at 70Hz is more than 95%.The vibration isolation efficiency of the engine under the ran­dom excitation from 15Hz to 2000Hz is more than 75%.The loss factor of the system measured by the phase method is more than 2.2,which indicates that the designed vibration isolation system has excellent damping performance.The paper can provide technical support for the design and performance verification of turboprop engine vibration isolation system.

关 键 词：涡桨发动机 隔振系统 隔振效率 橡胶隔振 

分 类 号：U46[机械工程—车辆工程]