Passive shock wave attenuation using shock-free surface interaction in combination with shock focusing techniques

使用无冲击表面相互作用与冲击聚焦技术相结合的被动冲击波衰减

• 批准号: 1437412
• 负责人: Ivan Bermejo-Moreno
• 金额: $ 26.99万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1437412&HistoricalAwards=false
• 关键词: Passive; shock; wave; attenuation; using

PI: Eliasson, VeronicaProposal Number: 1437412The goal of the proposed experimental study is to investigate the interaction of shock waves with liquids and to discover ways to mitigate shock wave effects. This proposal is aimed at the investigation of how shock wave attenuation can be obtained by adding liquid sheets in specific geometric shapes in the path of a propagating shock wave. The fundamental work proposed here can have applications on designing cheap and reliable methods to protect buildings, vehicles, and humans from threats of shock and blast wave impact. For example, it can have an impact in the construction and mining industries where blast technology, explosives and detonation are important. Accidents in both surface and underground mines can lead to shock wave propagation with devastating effects, therefore, shock wave attenuation should be promoted to reduce damage and injury.The primary research objectives are (a) to understand the dynamics between the incident shock wave and the free surface, and (b) to explore and quantify how the degree of attenuation depends on the role of Newtonian and non-Newtonian fluids and their mass, as well as thermal and inertial properties. Direct measurements of shock wave amplitude, peak pressure, total impulse in addition to quantitative and qualitative high-speed shock wave imaging will be obtained for all cases. Gaining such fundamental understanding can lead to methodologies to reduce shock impact using available and environmentally friendly liquids. Experiments will be performed in a shock tube, and numerical simulations will be performed using a finite volume approach. In terms of outreach and education, the proposal includes a well-articulated plan to involve graduate and undergraduate students in research. The Pi will work with the WiSE Program (Women in Science and Engineering) at the U of South California, whose purpose is to support and promote the participation of women and minorities, both students and faculty, in the academic life at USC. The PI will also involve high school students from the Los Angeles area in her research throughout this project.

主要研究者：Eliasson，Veronica提案编号：1437412拟议实验研究的目标是研究冲击波与液体的相互作用，并发现减轻冲击波效应的方法。该建议旨在研究如何通过在传播冲击波的路径中添加特定几何形状的液体片来获得冲击波衰减。这里提出的基础工作可以应用于设计廉价和可靠的方法来保护建筑物，车辆和人类免受冲击波和冲击波的影响。例如，它可以对建筑和采矿业产生影响，因为爆破技术、炸药和引爆都很重要。冲击波在地表和地下矿井中的传播具有破坏性，因此，应促进冲击波衰减以减少损害和伤害。主要研究目标是：（a）了解入射冲击波与自由表面之间的动力学，以及（B）探索和量化衰减程度如何取决于牛顿和非牛顿流体的作用及其质量，以及热性质和惯性性质。对于所有病例，除了定量和定性高速冲击波成像外，还将获得冲击波振幅、峰值压力、总冲量的直接测量值。获得这种基本的理解可以导致使用可用的和环境友好的液体来减少冲击影响的方法。实验将在激波管中进行，数值模拟将使用有限体积法进行。在推广和教育方面，该提案包括一个明确的计划，让研究生和本科生参与研究。Pi将与南加州大学的WiSE计划（科学与工程领域的女性）合作，该计划的目的是支持和促进女性和少数民族（包括学生和教师）参与南加州大学的学术生活。PI还将涉及高中学生从洛杉矶地区在她的研究在整个项目。