Numerical Modelling of Meteoroid Airbursts and Blastwaves

2013年2月15日的车里雅宾斯克事件揭示了一个相对较小的冲击器的空爆可能造成的潜在损害。类似大小(直径1-100米)的近地天体可能比之前认为的更丰富，很难观察到，可能会在几乎没有警告的情况下撞击地球。这使得能够快速准确地模拟它们的潜在损害成为当务之急。已发展了几个半解析模型来预测石质流星体灾难性碎裂过程中的大气能量沉积。我的项目是基于对这些当前模型的评估，并开发新的方法来对潜在的影响因素进行概率风险评估。这包括研究它们在大气中的分解、产生的冲击波及其潜在的地面损害。

The Chelyabinsk event on 15 February 2013 brought to light the potential damage that can be caused by an airburst from a relatively small impactor. Near-Earth Objects of comparable size (1-100 m diameter) maybe more abundant than previously thought, are difficult to observe and may strike Earth with little to no warning. This makes being able to model their potential damage quickly and accurately imperative. Several semi-analytical models have been developed to predict the atmospheric energy deposition during catastrophic fragmentation of stony meteoroids. My project is based on evaluating these current models and developing new methods for probabilistic hazard assessment of potential impactors. This involves studying their breakup in the atmosphere, the blastwaves produced and their potential ground damage.