Dynamics of Novel Air-Assisted Marine Vehicles

该项目将研究新型空气辅助海洋航行器的动力学，包括节能的气腔船体和快速两栖平台。这些飞行器的动力学非常复杂，因为在船体和水之间的柔顺空域中存在非定常现象，并且在海-气界面附近有高速的物体运动。主要的研究目标是推导和研究车辆运动的动力学系统，并建立确定静态和动态稳定性、在波浪和过渡区域中运动的方法以及有效的控制方法。这项工作的范围包括推导车辆动力学的数学模型，通过简化的建模、详细的计算仿真和实验来确定作用力，以及验证气辅海洋航行器缩尺实验模型的理论结果。这项研究将为如何设计和控制具有优异效率和速度特性的新型海上气助海洋航行器提供理解。货船将受益于空气腔系统，该系统可以减少高达30%的阻力。减少水下噪音和尾流冲洗将是额外的环保副产品。速度远高于每小时100英里的超高速重型水陆两栖飞行器将为北极地区以及海洋和岛屿上的救援和安全行动提供高效的交通工具。已取得的研究成果将广泛传播，并纳入现有和新的课程和暑期学校。先进的海上航行器示范模型将为招收工程专业的学生提供一个有效的手段。

This project will investigate the dynamics of novel air-assisted marine vehicles that include energy-efficient air-cavity hulls and fast amphibious platforms. The dynamics of these vehicles is very complex due to unsteady phenomena in compliant air zones between hulls and water and high-speed body motions near the air-sea interface. The main research goals are to derive and investigate dynamical systems for vehicle motions and to establish methods for determining static and dynamic stability, motions in waves and transient regimes, and effective control approaches. The scope of this work include derivation of mathematical models for vehicle dynamics, determination of forces with help of simplified modeling, detailed computational simulations, and experiments, and validation of theoretical findings on scaled experimental models of air-assisted marine vehicles.This research will provide understanding on how to design and control novel sea-going air-assisted marine vehicles with exceptional efficiency and speed characteristics. Cargo ships will benefit from air cavity systems that can decrease drag by up to 30 percent. Reductions in underwater noise and wake wash will be additional environmentally friendly by-products. Ultra-fast heavy-lift amphibious craft with speeds well above 100 mph will provide efficient transportation means for Arctic regions and for rescue and security operations in oceans and on islands. Obtained research results will be broadly disseminated and integrated into existing and new courses and summer schools. Demonstrator models of advanced marine vehicles will provide an effective means to recruit students to careers in engineering.