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首页> 外文会议>AIAA Aerospace Sciences Meeting;AIAA SciTech Forum >Impact of Aeroelastic Uncertainties on the Sonic Boom Signature of a Commercial Supersonic Transport Configuration
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Impact of Aeroelastic Uncertainties on the Sonic Boom Signature of a Commercial Supersonic Transport Configuration

机译：气动弹性不确定性对商业超音速运输配置的音爆特征的影响

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The sonic boom signature and loudness values of a supersonic vehicle depend on its flight shape. In this study, we investigate how the aeroelastic deformations and the aeroelastic uncertainties arising from structural parameter variations can affect the sonic boom response. A high fidelity aeroelastic framework based on viscous flow solutions and modal aeroelastic coupling is employed using FUN3D, and the near-pressure distribution is propagated to the ground using sBOOM, an augmented Burger's equation-based aeroacoustic solver. The current work is carried out under NASA's Commercial Supersonic Technology Project, and the analyses are focused on the LM-1044 aircraft configuration as a low boom N+2 supersonic vehicle design. Results obtained from a rigid mesh and an aeroe-lastically deformed mesh are compared to understand the impact of wing deformation on sonic boom. An uncertainty quantification study is then conducted using a non-intrusive polynomial chaos expansion, by propagating a set of random material variables through the complete analysis process, in order to compute random fluctuations in the sonic boom signature.
机译：超音速飞行器的音爆信号和响度值取决于其飞行形状。在这项研究中，我们研究了结构参数变化引起的气动弹性变形和气动弹性不确定性如何影响音爆的响应。使用FUN3D采用基于粘性流解和模态气动弹性耦合的高保真气动弹性框架，并使用sBOOM（基于增强型Burger's方程的气动声学求解器）将近压力分布传播到地面。当前的工作是在美国宇航局的商业超音速技术项目下进行的，分析重点是作为低动臂N + 2超音速飞行器设计的LM-1044飞机配置。比较了从刚性网格和气动变形网格获得的结果，以了解机翼变形对音爆的影响。然后使用非侵入式多项式混沌展开进行不确定性定量研究，方法是通过完整的分析过程传播一组随机材料变量，以便计算声波喷杆特征中的随机波动。

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