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为了分析由气动载荷引起的飞机起落架舱门开度问题,首先建立了起落架刚体虚拟样机模型,分析了气动载荷引起的起落架各构件受力情况并进行了静力分析,根据静力分析得到边界条件对部分构件进行有限元分析,最后建立了起落架刚柔耦合模型并进行了动力学分析。分析结果表明:气动载荷所引起的飞机起落架前、后舱门的最大开度分别为29.56 mm和3.559 mm,所导致的主要原因为相关关键部件发生弹性变形,并由此建议提高关键受力部件的强度以减小舱门开度。
In order to analyze the problem of aircraft landing gear door opening caused by aerodynamic loads, a virtual prototype model of landing gear rigid body was established. The stress of landing gear components caused by aerodynamic loads was analyzed and the static analysis was carried out. According to static analysis Boundary conditions were obtained for the finite element analysis of some components. Finally, a rigid-flexible coupling model of landing gear was established and the dynamic analysis was carried out. The results show that the maximum opening of the front and rear doors of the landing gear caused by aerodynamic loads are 29.56 mm and 3.559 mm, respectively. The main reason for this is the elastic deformation of the relevant key components, and thus it is suggested to increase the key stress Strength of components to reduce hatch opening.