Hydroelastic Response and Optimization of Floating Runways

浮动跑道的水弹性响应与优化

• 批准号: 9714311
• 负责人: William Webster
• 金额: $ 9.99万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714311&HistoricalAwards=false
• 关键词: Hydroelastic; Response; Optimization; Floating; Runways

9714311 Webster The objective of the research is to develop theoretical tools for the feasibility study and the design of a floating runway for commercial air traffic in protected waters. There are three technical issues which govern the feasibility of a floating runway: structure, dynamic response and mooring. Since the light structures of shallow depth like floating runway are typically very flexible, the dynamic response of these runways to a variety of loads including waves, earthquakes, and the landing and taking off of aircraft needs to be small enough to avoid the structural failure and not to affect the airplane operations. Finally, mooring system must resist loads resulting from the action of wind, waves, currents and tides without failing. In the proposed research the runway will be modeled as orthotropic plate which we can use to analyze and optimize the horizontal distribution of the stiffness. The motion of the plate will be dynamically coupled with hydrodynamic loading from the free-surface motion of the surrounding fluid and with the mooring system. For determination of the hydrodynamic loads, the fluid region under the runway and outside the runway will be modeled by Green-Naghdi theory. The research will provide designers of these new platforms the tools necessary to analyze critical problems associated with these new platforms: motions and structural optimization, effects of earthquakes and tsunamis, mooring loads and localized slamming loads. All of these problems must be addressed before a design can be considered feasible and at the present time are no comprehensive tools available to perform this analysis. ***

该研究的目的是为在受保护水域进行商业空中交通的浮动跑道的可行性研究和设计开发理论工具。决定浮动跑道可行性的技术问题有三个：结构、动力响应和系泊。由于浮式跑道等浅层轻结构通常具有很强的灵活性，因此这些跑道对波浪、地震、飞机起降等各种载荷的动态响应需要足够小，以避免结构失效，不影响飞机的运行。最后，系泊系统必须承受风、浪、流和潮汐的作用而不失效。在本研究中，跑道将被建模为正交各向异性板，我们可以用它来分析和优化刚度的水平分布。板的运动将与来自周围流体的自由表面运动和系泊系统的水动力载荷动态耦合。为了确定水动力载荷，跑道下和跑道外的流体区域将采用Green-Naghdi理论进行建模。这项研究将为这些新平台的设计者提供必要的工具来分析与这些新平台相关的关键问题：运动和结构优化、地震和海啸的影响、系泊载荷和局部撞击载荷。所有这些问题都必须在设计被认为可行之前解决，而目前还没有全面的工具可用于执行此分析。＊＊＊