Hydraulic characteristics of mobile breakwaters composed of tires or spheres

Two new types of mobile breakwaters consisting of tire and sphere assemblies, respectively, were tested. Tests covered a wide range of wave conditions, water depths, and breakwater dimensions. Experimental measurements were made to determine the wave reflection and wave transmission coefficients, the power dissipated by the breakwaters, and the...

Shock Pressures Caused by Waves Breaking against Coastal Structures

Shock pressures of high intensity and short duration may occur during breaking of waves on coastal structures, slamming of ships, landing of seaplanes, and water entry of naval projectiles with flat nose. The phenomenon of shock pressures resulting from the impact between a solid and a liquid can better be described as a water hammer phenomenon...

SCALE EFFECT TESTS FOR RUBBLE-MOUND BREAKWATERS: Hydraulic Model Investigation

Laboratory investigations conducted by and for the Waterways Experiment Station under ES 815, "Stability of Rubble-Mound Breakwaters," determined the relative importance of the different variables with respect to the stability of rubble-mound breakwaters and formulated design criteria for those structures. In ES 815, test-wave dimensions, water...

A new perspective on diesel engine evaluation based on second law analysis

Robust collision avoidance for multiple micro aerial vehicles using nonlinear model predictive control

When several Multirotor Micro Aerial Vehicles (MAVs) share the same airspace, reliable and robust collision avoidance is required. In this paper we address the problem of multi-MAV reactive collision avoidance. We employ a model-based controller to simultaneously track a reference trajectory and avoid collisions. Moreover, to achieve a higher...