Multi-objective optimization of the design parameters in longitudinal corrugated tubes to improve crashworthiness performance

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2024-11-16 DOI:10.1016/j.ast.2024.109728

Mehrdad Koloushani , Mohammad Reza Forouzan , Mohammad Reza Niroomand

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Abstract

Longitudinal corrugated tubes (LCTs) are among the structures of interest to designers, because of their ability to improve the weaknesses of conventional simple tubes by reducing the maximum crushing force (F_max) and providing a controllable and predictable force-displacement curve during energy absorption. In this study using finite element (FE) simulations, the effect of design parameters of LCTs, i.e., amplitude and number of folds on the crashworthiness criteria, in different deformation modes has been investigated. Crushing parameters of some simple and corrugated tubes have been examined experimentally to validate the FE simulations. Results of 400 FE models, revealed some geometries in LCTs that, in addition to reducing F_max, can increase the specific energy absorption (SEA) compared to the simple tubes. Most of these geometries deform under compressive axial loading in the N-mode region. Using multi-objective optimization, specification of the optimal LCT, including number of folds and their amplitudes were determined. Then the optimal LCT was made by the ring-forming method and compared with the simple tube experimentally. The optimized LCT was experimentally evaluated and results showed that it can reduce F_max by 27.2% and increase SEA by 21.6% compared to the simple tube. The lower SEA of the LCTs is usually considered as a disadvantage for the LCTs compared to the simple tubes, which is violated in this research. Optimized LCT may be a new idea for aerospace applications as crash-resistant structures.

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多目标优化纵向波纹管设计参数，提高防撞性能

纵向波纹管（LCT）是设计人员感兴趣的结构之一，因为它能够通过降低最大压溃力（Fmax）来改善传统简单管材的弱点，并在吸能过程中提供可控且可预测的力-位移曲线。本研究利用有限元（FE）模拟，研究了 LCT 的设计参数（即褶皱的幅度和数量）在不同变形模式下对防撞标准的影响。通过实验检验了一些简单管材和波纹管的破碎参数，以验证有限元模拟结果。400 个有限元模型的结果表明，与简单管材相比，LCT 的某些几何形状除了能降低 Fmax 外，还能增加比能量吸收（SEA）。这些几何形状大多在 N 模式区域的压缩轴向载荷作用下发生变形。通过多目标优化，确定了最佳 LCT 的规格，包括褶皱数量及其振幅。然后用环形方法制作了最佳 LCT，并与简单管进行了实验比较。对优化 LCT 进行了实验评估，结果表明，与简单管相比，优化 LCT 可将 Fmax 降低 27.2%，将 SEA 提高 21.6%。与简单管道相比，LCT 较低的 SEA 通常被认为是 LCT 的劣势，而本研究却打破了这一观点。优化的 LCT 可能是航空航天应用中抗撞结构的一个新思路。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.