直升机机身下部复合材料典型结构耐坠特性研究

抗坠性能是武装直升机的一项重要要求,设计具有较高抗坠吸能性能的机身下部结构是实现直升机抗坠要求的主要技术途径。研究了多种形式的复合材料结构元件抗坠特性,在元件研究基础上优化选择复合材料波纹梁和厚蜂窝结构组合,提出了一种新颖的具有较高抗坠吸能性能的复合材料组件形式,并利用有限元理论及试验的方法进行了对比研究分析,计算结果和试验结果吻合较好。

ANALYSIS OF CRASH IMPACT BEHAVIOUR OF TYPICAL COMPOSITE COMPONENTS OF HELICOPTER BOTTOM STRUCTURE

The crash characteristics are an important requirement of army helicopters. It is a main technical measure that the bottom fuselage structure possesses high impact energy-absorbing capability. The study of crash impact behavior of typical composite structure components is carried out the first time in China in this paper. Based on the components study, an optimum new structural assembly combining composite wave beams and thick honeycomb elements is put forward, which possesses high impact energy-absorbing capability. Theoretical calculating and testing are combined to do this research work. The validation and effectiveness of estimating and theoretical calculating are demonstrated by the results of tests. Also, the study result of this paper has been applied to the practical design of helicopter structures.