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参考某民用客机座舱盖侧壁板结构的三维模型,基于鸟撞事故过程的特点与规律,在PAM-CRASH环境中建立了有限元鸟撞模型,计算所得的结果与试验结果吻合较好。根据分析结果,提出了几种侧壁板抗鸟撞设计的优化方案。从装配协调、结构重量损失等各方面比较了各种优化方案,通过有限元鸟撞模型对各方案抗鸟撞性能进行了动响应分析、比较。分析结果表明,加强座舱盖侧壁板结构最薄弱处的刚度,提升整个结构刚度过渡的平滑度,能够非常明显地提升侧壁板结构的抗鸟撞性能。
With reference to the three-dimensional model of cockpit cover sidewall structure of a civil airliner, based on the characteristics and rules of the collision process, a finite element bird strike model was established in PAM-CRASH environment. The calculated results are in good agreement with the experimental results. According to the analysis results, several optimization schemes of anti-bird strike design of side wall are proposed. Various optimization schemes are compared from the aspects of assembly coordination and structural weight loss, and the dynamic response of each scheme is analyzed and compared through the FEM model. The analysis results show that the rigidity of the cantilever side wall structure at the weakest point can be strengthened and the smoothness of the whole structure’s stiffness transition can be enhanced, which can obviously enhance the anti-bird strike performance of the side wall structure.