某型飞机进气道在噪声环境中的振动疲劳分析  

Vibration Fatigue Analysis of Plane Inlet Channel under Noise Environment

作　　者：徐志刚[1] 陈荣[1] 李权[1] 姚起杭[2] 

机构地区：[1]北京航空工程技术研究中心,北京100076 [2]西北工业大学,西安710076

出　　处：《装备环境工程》2011年第4期100-103,共4页Equipment Environmental Engineering

摘　　要：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。Failures usually appeared in inlet channel of certain plane such as skin cracking,rivet loosing and rivet head broking,which are becoming incipient fault of flight safety.Research results showed that the failure is structure vibration fatigue damage caused by pulsating noise pressure in intense noise environment.Application of damping layer can lower the influence of intense noise on skin and rivet.Ground experiment results of engine showed that application of the damping layer has lowered vibration level of the inlet channel skin obviously.

关 键 词：噪声激振 振动疲劳 阻尼层 

分 类 号：TG171[金属学及工艺—金属表面处理] V252[金属学及工艺—金属学]