Purpose

The purpose of this paper is to present the result of calculations that were performed to estimate the structural weight of the passenger aircraft using novel technological solution. Mass penalty resulting from the installation of the fuselage boundary layer ingestion device was needed in the CENTRELINE project to be able to estimate the real benefits of the applied technology.

Design/methodology/approach

This paper focusses on the finite element analysis (FEA) of the fuselage and wing primary load-carrying structures. Masses obtained in these analyses were used as an input for the total structural mass calculation based on semi-empirical equations.

Findings

Combining FEA with semi-empirical equations makes it possible to estimate the mass of structures at an early technology readiness level and gives the possibility of obtaining more accurate results than those obtained using only empirical formulas. The applied methodology allows estimating the mass in case of using unusual structural solutions, which are not covered by formulas available in the literature.

Practical implications

Accurate structural mass estimation is possible at an earlier design stage of the project based on the presented methodology, which allows for easier and less costly changes in designed aircrafts.

Originality/value

The presented methodology is an original method of mass estimation based on a two-track approach. The analytical formulas available in the literature have worked well for aeroplanes of conventional design, but thanks to the connection with FEA presented in this paper, it is possible to estimate the structure mass of aeroplanes using unconventional technological solutions.

中文翻译：

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有限元分析和半经验方程式在客机重量估计中的应用

目的

本文的目的是介绍使用新颖的技术解决方案来估算客机结构重量的计算结果。CENTRELINE项目需要安装机身边界层摄入装置而导致重量损失，以便能够估计所应用技术的真正优势。

设计/方法/方法

本文着重于机身和机翼主要载荷结构的有限元分析（FEA）。这些分析中获得的质量用作基于半经验方程式的总结构质量计算的输入。

发现

将FEA与半经验方程式结合使用，可以在技术准备就绪的早期阶段估计结构的质量，并且有可能获得比仅使用经验公式获得的结果更准确的结果。在使用非常规结构解决方案的情况下，所应用的方法可以估算质量，该解决方案未包含在文献中可用的公式中。

实际影响

根据提出的方法，在项目的较早设计阶段就可以进行准确的结构质量估算，从而可以更轻松，更省钱地设计飞机。

创意/价值

提出的方法是基于两轨方法的质量估计的原始方法。文献中可用的分析公式对常规设计的飞机效果很好，但是由于本文介绍了与FEA的联系，因此可以使用非常规技术解决方案来估计飞机的结构质量。