Purpose

The purpose of this paper is to present a quick inspection method based on the post-flight data to examine static aeroelastic behavior for transport aircraft subjected to instantaneous high g-loads.

Design/methodology/approach

In the present study, the numerical approach of static aeroelasticity and two verified cases will be presented. The non-linear unsteady aerodynamic models are established through flight data mining and the fuzzy-logic modeling of artificial intelligence techniques based on post-flight data. The first and second derivatives of flight dynamic and static aeroelastic behaviors, respectively, are then estimated by using these aerodynamic models.

Findings

The flight dynamic and static aeroelastic behaviors with instantaneous high g-load for the two transports will be analyzed and make a comparison study. The circumstance of turbulence encounter of the new twin-jet is much serious than that of four-jet transport aircraft, but the characteristic of stability and controllability for the new twin-jet is better than those of the four-jet transport aircraft; the new twin-jet transport is also shown to have very small aeroelastic effects. The static aeroelastic behaviors for the two different types can be assessed by using this method.

Practical implications

As the present study uses the flight data stored in a quick access recorder, an intrusive structural inspection of the post-flight can be avoided. A tentative conclusion is to prove that this method can be adapted to examine the static aeroelastic effects for transport aircraft of different weights, different sizes and different service years in tracking static aeroelastic behavior of existing different types of aircraft. In future research, one can consider to have more issues of other types of aircraft with high composite structure weight.

Originality/value

This method can be used to assist airlines to monitor the variations of flight dynamic and static aeroelastic behaviors as a complementary tool for management to improve aviation safety, operation and operational efficiency.

中文翻译：

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瞬时高g载荷下喷气运输机飞行动态和静态气动弹性行为的评估

目的

本文的目的是提出一种基于飞行后数据的快速检查方法，以检查承受瞬时高 g 载荷的运输机的静态气动弹性行为。

设计/方法/方法

在本研究中，将介绍静态气动弹性的数值方法和两个经过验证的案例。通过飞行数据挖掘和基于飞行后数据的人工智能技术的模糊逻辑建模，建立了非线性非定常气动模型。然后使用这些空气动力学模型分别估计飞行动态和静态气动弹性行为的一阶和二阶导数。

发现

对两种运输工具在瞬时高g载荷下的飞行动静气动弹性行为进行分析和对比研究。新型双发飞机遭遇湍流的情况比四发运输机严重，但新型双发飞机的稳定性和可控性优于四发运输机；新的双喷气运输机也被证明具有非常小的气动弹性效应。使用这种方法可以评估两种不同类型的静态气动弹性行为。

实际影响

由于本研究使用存储在快速访问记录器中的飞行数据，因此可以避免飞行后的侵入式结构检查。一个初步的结论是证明该方法可以适用于不同重量、不同尺寸、不同服役年限的运输机在跟踪现有不同类型飞机的静态气动弹性行为时的静态气动弹性效应。在未来的研究中，可以考虑更多其他类型的复合结构重量高的飞机的问题。

原创性/价值

该方法可用于协助航空公司监测飞行动态和静态气动弹性行为的变化，作为管理的补充工具，以提高航空安全、运营和运营效率。