吊挂飞行对重型直升机空中共振稳定性的影响机理分析
收稿日期: 2022-09-08
修回日期: 2022-09-21
录用日期: 2022-11-14
网络出版日期: 2022-11-29
基金资助
国家自然科学基金(11672128);江苏高校优势学科建设工程资助项目
Effects of slung load on heavy lift helicopter air resonance stability
Received date: 2022-09-08
Revised date: 2022-09-21
Accepted date: 2022-11-14
Online published: 2022-11-29
Supported by
National Natural Science Foundation of China(11672128);Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
飞行员驾驶重型直升机完成飞行任务时，可能出现与机体弹性变形有关的空中共振问题，且在吊挂飞行时会加剧，因此通过刚弹耦合建模与分析指出了重型直升机吊挂飞行时可能导致空中共振的3个耦合模态：旋翼摆振前进型-机体垂向弯曲耦合模态；旋翼-机体-吊索耦合模态；摆振后退型-机体滚转耦合模态。研究了这3个耦合模态对重型直升机空中共振稳定性的影响机理。分析结果表明：第1个耦合模态在重载吊挂悬停时最容易导致空中共振，而第2个耦合模态在轻载吊挂飞行时对空中共振稳定性影响最大，它们都会涉及旋翼摆振运动与机体垂向弯曲变形的耦合，但第2种会出现明显的吊索伸缩运动；第3个耦合模态会导致空中共振稳定裕度在重载吊挂时降低18%。
王洛烽 , 陈仁良 . 吊挂飞行对重型直升机空中共振稳定性的影响机理分析[J]. 航空学报, 2023 , 44(16) : 227983 -227983 . DOI: 10.7527/S1000-6893.2022.27983
Piloted heavy lift helicopters are faced with air resonance problems related to fuselage elasticity， which deteriorate when carrying a slung load. This paper points out three coupled modes that may lead to air resonance through heavy lift helicopters with slung load through rigid-elastic coupled modeling and analysis. The first is rotor progressive lag and fuselage vertical bending coupled mode， the second rotor-body-sling coupled mode， and the third regressive lag and fuselage rolling coupled air resonance. Their mechanisms and effects of slung load on air resonance stability were investigated. The results show that the first coupled mode is most likely to cause air resonance while hovering with heavy slung load， and that the second coupled mode has the largest impact on the air resonance stability when flying with light slung load. They are both related to rotor lagging motion and fuselage vertical bending， but the second involves significant sling extending-retracting. The third coupled mode causes an 18% reduction in air resonance stability margin when carrying a heavy slung load.
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