Impact of Fluid-Thermal-Structural Coupling on Response Prediction of Hypersonic Skin Panels
Impact of Fluid-Thermal-Structural Coupling on Response Prediction of Hypersonic Skin Panels
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DOI：
10.2514/1.j050617
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发表时间：
2011-11
期刊：
影响因子：
2.5
通讯作者：
A. Culler;J. McNamara
中科院分区：
文献类型：
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作者：
A. Culler;J. McNamara
DOI：10.2514/1.J050617美国空军的目标是部署能够持续高超声速飞行和响应进入太空的耐用平台，这取决于预测结构在气动和气动压力联合加载下的响应和寿命的能力。然而，目前对这些情况的预测能力是有限的，部分原因是无法无缝地处理流体-热-结构相互作用。这项研究旨在量化一个经常被忽视的相互作用，即结构变形和气动加热的相互耦合对响应预测的意义。研究了碳/碳蒙皮板的准静态响应。结果发现，这种耦合的重要性在很大程度上取决于面内边界条件，因为增加热膨胀阻力会导致屈曲和流向流动的挠度增加。在气动加热中计入这些变形，导致峰值温度增加O10%，面板长度挠度O1%的表面铺层失效指数增加O100%。在这些情况下，peaktemperaturesandstressesaresignificantlyaltered.Finally，neglectingdeformationsintheaeroheatinganalysis的位置导致了对逐渐加热轨迹的快速穿透的预测，而包裹体导致了更高的模式主导的动态稳定的响应。
DOI: 10.2514/1.J050617 The goal of the United States Air Force to field durable platforms capable of sustained hypersonic flight and responsive access to space depends on the ability to predict the response and the life of structures under combined aerothermal andaeropressure loading. However,current predictive capabilities are limitedfor these conditions due in part to the inability to seamlessly address fluid-thermal-structural interactions. This study aims to quantify the significance of a frequently neglected interaction, namely: the mutual coupling of structural deformation and aerodynamic heating, on response prediction. The quasi-static response of a carbon–carbon skin panel is investigated. It is found that the significance of this coupling depends largely on the in-plane boundary conditions, since increasing resistance to thermal expansion results in buckling and increasing deflections into the flow. Including these deformations in aerodynamic heating results in O10% increase in peak temperature and O100% increase in surface ply failure index for deflections O1% of panel length. In these cases, the locations of peaktemperaturesandstressesaresignificantlyaltered.Finally,neglectingdeformationsintheaeroheatinganalysis results in the prediction of snap-through for a gradual heating trajectory, whereas, inclusion leads to a higher mode dominated, dynamically stable response.