Aircraft impact: Coupled dynamic simulations part 1: Modelling aspects

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Design Pub Date : 2025-04-05 DOI:10.1016/j.nucengdes.2025.114046

Pierre Wörndle , Robert Borsutzky , Thomas Schubert

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引用次数: 0

Abstract

During the last five decades, the load case “aircraft impact” changed constantly with regard to the definition of the threat, the applied analysis methods, and the required checks; particularly in the analysis of concrete structures in the nuclear sector. On the one hand, the load case was extended from military aircrafts to commercial aircrafts and on the other hand, the rapid development of computer hardware allowed more and more complex numerical simulations with detailed modelling of aircraft and building structure in a coupled analysis. Keeping this development in mind, as well as additional confidential aspects, increasing authorities’ requirements and the lack of detailed normative guidelines, these kinds of specialized analyses can only be performed with deep knowledge not only of the general aspects of the aircraft impact load cases but also of the complex numerical modelling and simulation of these situations.

This article is the first part of a two-part publication. In terms of content, the two publications focus on the two overarching topics that need to be considered in a typical aircraft impact assessment: on the one hand, the aspects of modeling and structural analysis and, on the other, the assessment of vibrations and the design of mitigation measures. The first part of this paper covers critical modeling aspects within the scope of a coupled structural analysis as well as aspects of assessing the structural damage. For this, this paper summarizes some of the main issues regarding the actual state-of-the-art Aircraft Impact Analysis (AIA) and points out the most discussed topics with focus on numerical modelling aspects in coupled dynamic AIA simulations.

One of the main conclusions for a state-of-the-art Aircraft Impact Analysis (AIA) is the recommendation of a detailed numerical aircraft model or at least of the center wing box and the attached wings and a coupled dynamic simulation with the impacted structure. With regard to the introduced shear forces, this approach is the only one that allows for the necessary detailed analysis of local impact effects and ultimately leads to a comprehensive assessment of the structural resistance.

In the second part of this publication, Wörndle and Borsutzky (planned to be published), the aspects of assessment criteria regarding induced vibrations are discussed, supplemented by examples of mitigation methods.

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飞机撞击：耦合动态模拟。第1部分：建模方面

在过去的五十年中，载荷案例“飞机撞击”在威胁的定义、应用的分析方法和所需的检查方面不断变化；特别是在核部门的混凝土结构分析方面。一方面，载荷范围从军用飞机扩展到商用飞机；另一方面，计算机硬件的快速发展使得越来越复杂的数值模拟成为可能，可以对飞机和建筑物结构进行详细的耦合分析建模。考虑到这一发展，以及额外的机密方面，当局的要求越来越高，缺乏详细的规范性指导方针，这些类型的专业分析只能在深入了解飞机冲击载荷情况的一般方面以及这些情况的复杂数值建模和模拟的情况下进行。本文是由两部分组成的出版物的第一部分。就内容而言，这两份出版物侧重于典型飞机冲击评估中需要考虑的两个首要主题：一方面是建模和结构分析方面，另一方面是振动评估和缓解措施设计。本文的第一部分涵盖了耦合结构分析范围内的关键建模方面以及结构损伤评估方面。为此，本文总结了目前最先进的飞机撞击分析（AIA）的一些主要问题，并指出了耦合动态AIA仿真中讨论最多的问题，重点是数值模拟方面。最先进的飞机碰撞分析（AIA）的主要结论之一是建议使用详细的数值飞机模型，或至少是中央翼盒和附属机翼，以及与碰撞结构耦合的动态模拟。关于引入的剪力，这种方法是唯一允许对局部冲击效应进行必要的详细分析并最终导致对结构阻力进行全面评估的方法。在本出版物的第二部分Wörndle和Borsutzky（计划出版）中，讨论了有关诱发振动的评估标准的各个方面，并辅以减缓方法的实例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Engineering and Design 工程技术-核科学技术

CiteScore

3.40

自引率

11.80%

发文量

377

审稿时长

5 months

期刊介绍： Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology. Fundamentals of Reactor Design include: • Thermal-Hydraulics and Core Physics • Safety Analysis, Risk Assessment (PSA) • Structural and Mechanical Engineering • Materials Science • Fuel Behavior and Design • Structural Plant Design • Engineering of Reactor Components • Experiments Aspects beyond fundamentals of Reactor Design covered: • Accident Mitigation Measures • Reactor Control Systems • Licensing Issues • Safeguard Engineering • Economy of Plants • Reprocessing / Waste Disposal • Applications of Nuclear Energy • Maintenance • Decommissioning Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.