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首页> 外文会议>Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments >Apollo Seismic Data Interpretation Using an Elastodynamic Space-Time Spectral Element Technique and Dispersion Image Inversion Method
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Apollo Seismic Data Interpretation Using an Elastodynamic Space-Time Spectral Element Technique and Dispersion Image Inversion Method

机译：用弹性动力学时空谱元技术和频散成像反演方法解释阿波罗地震资料

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The data collected during the Apollo seismic experiments can provide important information regarding the lunar subsurface conditions and the corresponding mechanical properties. This paper aims to determine the shear wave velocity of the shallow subsurface using an elastodynamic space-time spectral element forward solver and the trust region reflective algorithm for back-calculation. The elastodynamic forward solver provides a semi-analytical solution for the wave propagation through subsurface materials. The trust region reflective algorithm is a bounded non-linear least square algorithm that effectively reduces the difference (Euclidean distance) between measured and predicted data by iteratively improving the prediction of material properties. In this paper, the seismic data is used to generate a dispersion image of the lunar subsurface, which provides the relation between the phase (group) velocity and frequency. Such dispersion images can be used to derive the shear wave velocity in each layer.
机译：阿波罗地震实验期间收集的数据可以提供有关月球地下条件和相应机械特性的重要信息。本文旨在利用弹性动力学时空谱元正演算法和信赖域反射算法反演浅层地下剪切波速。弹性动力学正演解算器为波在地下材料中的传播提供了半解析解。信赖域反射算法是一种有界非线性最小二乘算法，通过迭代改进材料特性的预测，有效地减少了测量数据和预测数据之间的差异（欧氏距离）。本文利用地震数据生成月球表面下的频散图像，提供相位（群）速度和频率之间的关系。这样的色散图像可以用来推导每一层中的剪切波速。

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