客舱玻璃抗螺旋桨甩冰冲击分析

目的 研究涡桨飞机客舱玻璃抗螺旋桨甩冰分析方法。方法 根据某型涡桨飞机螺旋桨结冰特性计算分析得到的冰块质量以及冰块轨迹，筛选出严重载荷工况。建立客舱玻璃有限元模型，采用有限元软件PAM-CRASH进行数值计算，获得结构破坏形态和动态响应。开展客舱玻璃甩冰冲击研发试验，将试验后结构损伤与数值分析结果进行对比分析。结果 两种确定冰块质量和冰块速度方法，可适用于结构防甩冰设计的不同阶段；根据结冰特性计算分析得到的冰块质量10.27 g、垂向速度141.1 m/s更为准确合理。不同冰型撞击各个结构部位，会对结构造成不同程度的损伤。同一长方体冰型下，入射截面积越小，玻璃损伤越严重；撞击玻璃不同部位时，角部比中心点更为严重。结论 试验结果与仿真结果基本一致，可以验证所给出的客舱玻璃分析模型及分析方法的准确性，可供螺旋桨甩冰区域的客舱玻璃设计参考。

Ice Shedding Impact Analysis for Cabin Window of Civil Aircraft

The work aims to study the analysis method for cabin window of turboprop aircraft against propeller ice shedding. According to the propeller icing characteristics of a turboprop aircraft, the mass and trajectory of shedding ice were calculated and analyzed to screen out the serious loading condition. A finite element model of cabin window was established and finite element software PAM-CRASH was applied to numerical calculation to obtain structural failure morphology and dynamic response. Ice shedding impact experiment of cabin window was carried out and the results of structural failure and numerical analysis after experiment were analyzed comparatively. The two methods of determining ice mass and ice speed could be applied to different stages of structural ice shedding design. According to the calculation and analysis of icing characteristics, the ice mass of 10.27 g and the vertical speed of 141.1 m/s were more accurate and reasonable. Different ice types caused different degrees of damage to the structure when impacting various parts of the structure. Under the same cuboid ice pattern, the smaller the incident cross-sectional area was, the more serious the window damage was. When different parts of window were hit, the corner was more serious than the center point in view of damage. The experimental results are basically consistent with the simulation results, which can verify the accuracy of the cabin window analysis model and analysis method, and provide reference for cabin window design in propeller ice shedding area.