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Accurate Bird Strike Simulation Methodology for BA609 Tiltrotor

机译：BA609旋耕机的精确鸟击模拟方法

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摘要

Bird strike incidents cause significant flight safety threats to aircraft safety, resulting in certification requirements of "continued safe flight and landing" following specified types of high-energy bird impact. The higher impact velocities for bird strikes that tiltrotor aircraft must survive underscores the need to develop more capable, validated analysis techniques. This paper presents the state-of-the-art bird strike simulation methodology developed at Bell Helicopter, based on the multimaterial arbitrary Lagrangian-Eulerian and smooth particle hydrodynamics techniques. The constitutive parameters of the bird model are calibrated to correlate the hydrodynamic pressure with available test data. The validated bird models are subsequently applied to simulate bird impacts with the BA609 tiltrotor structures for the most load-critical test conditions. The analytical models are validated for multiple test cases with different design architectures. The developed analytical tool is capable of accurately predicting structural failure modes and deformation for aircraft subjected to high-energy bird strike impacts.
机译：鸟击事件对飞机安全造成重大的飞行安全威胁，导致在指定类型的高能鸟撞击后“持续安全飞行和着陆”的认证要求。倾转旋翼飞机必须承受的更高的鸟击冲击速度突显了开发更强大，经过验证的分析技术的需要。本文介绍了贝尔直升机公司基于多材料任意拉格朗日-欧拉和光滑粒子流体动力学技术开发的最先进的鸟撞模拟方法。校准了鸟模型的本构参数，以将水动力压力与可用的测试数据相关联。随后将经过验证的飞鸟模型应用于BA609倾转旋翼结构，以在最关键的载荷测试条件下模拟飞鸟撞击。分析模型针对具有不同设计架构的多个测试案例进行了验证。开发的分析工具能够准确预测遭受高能鸟撞撞击的飞机的结构破坏模式和变形。

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