基于神经网络模型的栅格结构接箍肋最大抗压屈曲强度优化

Q3 Earth and Planetary Sciences
Amir Kaveh, Jafar Eskandari Jam, Pouriya Barghamadi, Amirreza Ardebili, Mahdi Jafari
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引用次数: 0

摘要

复合晶格异质网格适配器是航天火箭设计中备受青睐的一种重要接口结构,是火箭级之间或载荷与支撑结构之间的关键接口结构。其独特的结构配置使其能够承受显著的重量载荷而不会屈曲。然而,优化其设计参数可以进一步提高其强度和效率。特别是对锥形点阵接头的下环肋进行加强,可以大大提高其在轴向压缩载荷下的强度,从而防止屈曲。在这项研究中,我们首先提出了一个网格适配器的有限元模型,该模型具有沿测地线路径的螺旋肋。为了验证模型的准确性,利用了前人研究的实验样机和有限元模型。随后,利用有限元分析结果生成的数据集训练神经网络模型。该神经网络模型旨在预测、探索和优化下箍筋厚度对接头临界轴向屈曲载荷的影响。分析最终证实,与采用均匀肋设计的接箍相比,采用优化肋设计的接箍在屈曲前的承载能力提高了51%。这强调了优化设计参数对提高空间火箭应用中结构性能的重要性。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Optimization of hoop ribs for maximum compressive buckling strength in lattice structure adapter using a neural network model

Optimization of hoop ribs for maximum compressive buckling strength in lattice structure adapter using a neural network model

Optimization of hoop ribs for maximum compressive buckling strength in lattice structure adapter using a neural network model

Composite lattice anisogrid adapters are highly favored in space rocketry design, serving as crucial interface structures between rocket stages or between the payload and its supporting structure. Their unique structural configuration allows them to withstand significant weight loads without succumbing to buckling. However, optimizing their design parameters could further enhance their strength and efficiency. Particularly, reinforcing the lower hoop ribs in a conical lattice adapter can substantially enhance its strength under axial compressive loads, thus preventing buckling. In this study, we begin by presenting a finite-element model of a lattice adapter featuring helical ribs that follow geodesic paths. To validate the model's accuracy, experimental prototypes and finite-element models from previous research are utilized. Subsequently, a neural network model is trained using the dataset generated from finite-element analysis results. This neural network model aims to predict, explore, and optimize the impact of lower hoop ribs' thicknesses on the critical axial buckling load of the adapter. The analysis ultimately confirms that an adapter designed with optimized ribs demonstrates a remarkable 51% increase in load capacity before buckling compared to an adapter designed with uniform ribs. This underscores the significance of optimizing design parameters for enhancing structural performance in space rocketry applications.

Graphical Abstract

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来源期刊
Aerospace Systems
Aerospace Systems Social Sciences-Social Sciences (miscellaneous)
CiteScore
1.80
自引率
0.00%
发文量
53
期刊介绍: Aerospace Systems provides an international, peer-reviewed forum which focuses on system-level research and development regarding aeronautics and astronautics. The journal emphasizes the unique role and increasing importance of informatics on aerospace. It fills a gap in current publishing coverage from outer space vehicles to atmospheric vehicles by highlighting interdisciplinary science, technology and engineering. Potential topics include, but are not limited to: Trans-space vehicle systems design and integration Air vehicle systems Space vehicle systems Near-space vehicle systems Aerospace robotics and unmanned system Communication, navigation and surveillance Aerodynamics and aircraft design Dynamics and control Aerospace propulsion Avionics system Opto-electronic system Air traffic management Earth observation Deep space exploration Bionic micro-aircraft/spacecraft Intelligent sensing and Information fusion
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