目的 针对航空装备机载设备振动控制难题,解决系统可靠性关键制约因素,亟需精准研究设备动力学特性并设计高效的减振方案。方法 开展振动试验与结构频域特性分析,定量获取设备在全频段的动力学响应特征。基于载荷传递路径优化理论,在设备与安装支架连接节点部署橡胶减振器,构建适配本机载设备工况的多向振动隔离系统。结果 设备在100~200 Hz 频段存在明显共振,大于100 Hz 频段加速度振动幅值较高。加装减振器后,x/y/z三向振动响应均值分别降低62.3%、70.1%、44.3%,实现了全向振动幅值有效抑制。结论 该振动隔离方案显著抑制高频振动传递,三向振动控制效果均超44%,减振后设备振动响应满足 DO-160G 机载设备环境试验振动限值要求,达到规范考核指标,可为机载设备可靠性提升提供关键技术支撑,同时为同类航空装备减振设计提供参考。
Abstract
Aiming at the vibration control challenge of airborne equipment for aeronautical systems, vibration is a critical limiting factor for system reliability. It is necessary to accurately investigate the dynamic characteristics of the equipment and develop an efficient vibration reduction scheme. Vibration tests and structural frequency-domain characteristic analysis were carried out to quantitatively obtain the full-band dynamic response characteristics of the equipment. Based on the load transfer path optimization theory, rubber vibration isolators were arranged at the connection nodes between the equipment and the mounting bracket to construct a multi-directional vibration isolation system adapted to the working conditions of the airborne equipment. Obvious resonance occured in the frequency band of 100-200 Hz, and the acceleration amplitude was relatively high above 100 Hz. After installing the vibration isolators, the average vibration responses in x/y/z directions were reduced by 62.3%, 70.1% and 44.3%, respectively, which realized effective suppression of vibration amplitudes in all directions. The proposed vibration isolation scheme can significantly suppress high-frequency vibration transmission, with the vibration reduction effect exceeding 44% in all three directions. The vibration response of the equipment after vibration reduction meets the vibration limit requirements specified in DO-160G and satisfies the specification assessment criteria. This research provides key technical support for improving the reliability of airborne equipment and offers a reference for the vibration reduction design of similar aeronautical equipment.
关键词
航空机载设备 /
振动试验 /
橡胶减振器 /
振动隔离设计与研究 /
振动控制
Key words
aircraft airborne equipment /
vibration test /
rubber damper /
vibration isolation design and study /
vibration control
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