某型飞机进气道常出现蒙皮裂纹、铆钉松动及掉铆钉头等故障,给飞行安全带来隐患。研究发现,此类故障是进气道在强噪声环境下,噪声脉动压力引起的结构振动疲劳损伤。应用阻尼层可降低强噪声对进气道蒙皮和铆钉的破坏。发动机地面试验结果表明,进气道阻尼层的应用显著降低了蒙皮壁板的振动量级。 Some aircraft air intake often appear skin cracks, rivet loose and rivet head off the first failure, to flight safety risks. The study found that such failures are structural vibration fatigue damage caused by noise pulsating pressure in the inlet under strong noise environment. Application of damping layer can reduce the strong noise damage to the inlet skin and rivets. The engine ground test results show that the application of the inlet damping layer significantly reduces the vibration magnitude of the skin panel.