MRI: Acquisition of a Large-Stroke, Piston-Type Wavemaker for Coastal Hazards Research and Education

这项拟议中的研究旨在为全国最大的沿海波浪水槽的新控制系统获得一个收购，以便在水力实验室波浪水槽的受控条件下精确，大规模模拟飓风波浪，海啸和其他沿海灾害。 这一新能力将使研究界能够研究人造和自然沿海环境中的一系列工程和科学问题，包括波浪对沿海基础设施的影响;波浪能系统的开发;应用于沿海系统的流体-结构相互作用的数值模型的进展;与沿海侵蚀和风暴后恢复有关的跨岸沉积物悬浮和运输;沙丘侵蚀和漫顶;海啸在珊瑚礁上的传播;以及环境流体沉积动力学。 高性能、大冲程活塞式造波机将通过在沿海沃茨提供大规模的飓风和海啸波，并采用动态反馈控制来吸收不需要的反射波和水槽假潮，从而解决尺度效应和实验室效应。 高性能造波机将为精确、大规模的研究提供国家资产，使沿海基础设施（包括桥梁、堤坝、建筑物和生命线）的设计更安全、更具成本效益。 这将导致更好的做法，为维修和改造现有的结构和改进的设计规范，为新的construction.There是超过3 T美元的民用基础设施沿着美国东部和墨西哥湾沿岸容易受到沿海风暴，和极端事件，如飓风的经济和社会影响预计将升级，由国家科学委员会（NSB，2007年）的报告。 超过一半的美国人口居住在离海岸50英里的范围内，到2010年，超过60%的人口将居住在那里。与此同时，由于海平面持续上升，美国大部分桑迪海岸遭受慢性侵蚀。随着侵蚀趋势的继续和人口预测的实现，国家的沿海边缘将承受巨大的发展压力（美国海洋政策委员会，2004年）。目前，美国任何地方都没有海岸研究设施来模拟飓风和其他大风暴，其规模大到足以使尺度效应最小化。 来自该设施的数据被存档，并可供其他研究人员验证数值模型和指导未来的发展。 高级人员鼓励通过现场的开放式讲习班共享设施。 该项目加强了对沿海结构和海岸侵蚀领域研究生的培训。研究和教育是通过在实验室建立的本科生计划的研究经验在本科水平集成。 教育和外联活动的目标是在本科阶段招聘和留住工程专业的妇女和少数民族，并通过图尔斯参观和实践活动激励3至5年级的K-12学生。

This proposed research seeks to acquire an acquisition for a new control system for the nation's largest coastal wave flume to enable precise, large-scale simulation of hurricane waves, tsunamis, and other coastal hazards under controlled conditions in a hydraulic laboratory wave flume. This new capability will allow the research community to study a range of engineering and scientific problems in constructed and natural coastal environments, including wave impacts on coastal infrastructure; development of wave energy systems; advances in numerical modeling of fluid-structure interaction with application to coastal systems, cross-shore sediment suspension and transport related to coastal erosion and recovery after storms; dune erosion and overtopping; tsunami propagation over reefs; and environmental fluid-sediment dynamics. The high performance, large-stroke piston-type wavemaker will address both scale effects and laboratory effects by providing hurricane and tsunami waves in coastal waters at large scale with a dynamic feedback control to absorb unwanted reflected waves and tank seiche. The high performance wavemaker will provide a national asset for precision, large-scale studies enabling safer and more cost effective design of coastal infrastructure including bridges, levees, buildings and lifelines. This will lead to better practices for the repair and retrofit of existing structures and improved design codes for new construction.There is over $3T in civil infrastructure along the East and Gulf coasts of the United States vulnerable to coastal storms, and the economic and societal impacts of extreme events such as hurricanes are expected to escalate as reported by the National Science Board (NSB, 2007). More than half of the U.S. population lives within 50 miles of the coast, and more than 60% will live there by 2010. Concurrently, most of the nation's sandy coasts suffer chronic erosion due to continued sea level rise. As erosion trends continue and as population projections are realized, the Nation's coastal margins will experience significant development pressures (US Commission on Ocean Policy, 2004). At present time there is no coastal research facilities anywhere in the United States that simulate hurricane and other large storms at scales large enough to minimize scale effects. Data from this facility are archived and available to other researchers to validate numerical models and guide future development. The senior personnel encourage the shared-use of the facility through open workshops at the site. This project enhances the training of graduate students in the areas of coastal structures and coastal erosion. Research and education is integrated at the undergraduate level through a Research Experience for Undergraduates Program established at the laboratory. Education and Outreach activities are targeted to the recruitment and retention of women and minorities in engineering at the undergraduate level and to inspire K-12 students at the 3rd through 5th grade level through tours and hands-on activities.