基于可靠性的飞机风挡抗鸟撞优化设计

Reliability-Based Optimization Design of Aircraft Windshield for Resisting Bird Impact

传统的飞机风挡设计通常在确定的工况下进行,未能充分考虑实际鸟撞风挡过程中不确定性因素的影响,导致飞机鸟撞风挡的故障多发。综合考虑鸟撞飞机风挡过程中鸟体材料参数、质量、撞击速度等不确定因素的影响,以飞机风挡抗鸟撞的可靠度为约束,风挡质量为目标,基于双循环方法和近似技术建立了风挡抗鸟撞可靠性优化设计系统,利用一阶矩法进行可靠性分析,对某飞机风挡进行了基于可靠性的优化设计。实例分析证明所建风挡抗鸟撞可靠性优化设计系统可行有效。

Traditional methods for aircraft windshield design are carried out based on determinate work condition.The effect of uncertainty factors during the process of windihield impacted by bird are not fully considered,so this result in low reliability of windshield performance.The effects of uncertainty factors into as bird body material paraineters,mass and inpact velocity during the process of windshield impacted by bird are considered.Reliability-based optimization design of windshield for resisting bird impact is set up according to the reliability of aircraft windshield for resisting bird impact and the windshield quality based on the double loop strategy and the approximation technique.The reliatility analysis is carried out by using the first-order reliability method.The reliability-based optimization design of aircraft wind shield for resinting bird impact is made.It is proved that this optimization design is feasible.