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首页> 外文期刊>Mathematical Problems in Engineering: Theory, Methods and Applications >Aerothermoelastic Load Calculation for Hypersonic Vehicles Based on Multiphysics Coupled Analysis
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Aerothermoelastic Load Calculation for Hypersonic Vehicles Based on Multiphysics Coupled Analysis

机译：基于多物理场耦合分析的高超声速飞行器气动热弹性载荷计算

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摘要

To fulfill the design objective of a structure and thermal protection system, accurate load environment prediction is very important, so we present a high-fidelity aerothermoelastic load calculation method based on a partitioned computational fluid dynamics/computational structural dynamics/computational thermal dynamics (CFD/CSD/CTD) coupling analysis. For the data transformation between the CFD/CSD/CTD systems, finite element interpolation (FEI) is explored, and a shape-preserving grid deformation strategy is achieved via radical basis functions (RBFs). Numerical results are presented for validation of the proposed CFD/CSD/CTD coupling analysis. First, a simply supported panel in hypersonic flow is investigated for results comparison of the proposed coupling method and previous work. Second, a hypersonic forebody is investigated to explore the aerothermoelastic effects while considering the feedback between deformation and aerodynamic heating. The results show that the CFD/CSD/CTD coupling method is accurate for analysis of aerothermoelasticity. In addition, considering the aerothermoelastic effect, the shear force and bending movement increase with time before and decrease after , and at increased percentages of 5.7% and 4.1% are observed, respectively. Therefore, it is necessary to adopt high-fidelity CFD/CSD/CTD coupling in the design of a structure and thermal protection system for hypersonic vehicles.
机译：为了实现结构和热保护系统的设计目标，准确的载荷环境预测非常重要，因此，我们提出了一种基于分区计算流体动力学/计算结构动力学/计算热力学（CFD / CSD / CTD）耦合分析。对于CFD / CSD / CTD系统之间的数据转换，探索了有限元插值（FEI），并通过根基函数（RBF）实现了保形网格变形策略。数值结果用于验证所提出的CFD / CSD / CTD耦合分析。首先，研究了高超声速流动中简单支撑的面板，以比较所提出的耦合方法和先前的工作。其次，研究了超音速前体，在考虑变形与空气动力加热之间的反馈的同时探索了空气热弹性效应。结果表明，CFD / CSD / CTD耦合方法对于分析空气热弹性是准确的。此外，考虑到气动弹性效应，剪切力和弯曲运动会随着时间的增加而增加，分别在5.7％和4.1％之间增加。因此，在设计用于超音速飞行器的结构和热保护系统时，必须采用高保真CFD / CSD / CTD耦合。

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