Experimental Study of the Acoustic Fluidization Mechanism for Large Landslides and Earthquakes

大型滑坡和地震的声流化机理实验研究

• 批准号: 8916005
• 负责人: H. Melosh
• 金额: $ 4.02万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916005&HistoricalAwards=false
• 关键词: Experimental; Study; Acoustic; Fluidization; Mechanism

Large landslides occur after an energetic trigger event, such as earthquakes and volcanic eruptions, which activates a mechanism called "acoustic fluidization", in accordance with a theory developed by the principal investigator. He has demonstrated that acoustic energy does facilitate the flow of rock debris in some preliminary experiments. Still, one of the major areas of uncertainty in this mechanism is the value of certain important material parameters that describe the production, scattering, and ultimately the loss of vibrational (acoustic) energy in a mass of lose rock debris. An experimental program to evaluate these parameters in the laboratory will be undertaken in which the stress-strain rate relation in a vibrating mass of debris will be measured, the physics of wave propagation and scattering in the debris will be studied, and the rate at which energy is lost by internal dissipation and gained during shearing of the debris mass will be estimated. This work will provide a better understanding of large-scale gravitational land failures.

大型滑坡发生在一个充满活力的 触发事件，如地震和 火山爆发，激活了 一种称为“声波流化”的机制， 根据一个理论开发的 首席调查员 他已经证明 声能确实促进了 在一些初步的 实验 尽管如此， 这种机制的不确定性是 某些重要的材料参数， 描述生产，分散， 最终，振动（声学）的损失 大量岩石碎片中的能量。 一个 实验项目来评估这些 实验室中的参数将是 应力应变率 在振动的大量碎片中， 测量，波传播的物理学， 将研究碎片中的散射， 内部能量损失的速率 在剪切过程中， 将估计碎片质量。 这项工作将 更好地理解大规模 重力地面故障。