Скачать или смотреть Added Mass & Damping Lab

Video of the apparatus used for the Added Mass & Damping lab class. This class is part of the senior level curriculum for the Department of Naval Architecture and Marine Engineering. The oscillating body is meant to represent a simplified mid section of a ship's hull (minus the bow and stern). The body is oscillated at a prescribed frequency and amplitude. A load cell is attached to the top of the body to record forces, while a wave probe (slender silver device in the water to the right side of the video) measures the amplitude and frequency of the waves created by the body's motion. By analyzing the data from these sensors, students can derive the added mass (mass of water that is en-trained, or following the motion of the body) and the damping (natural resistance to motion that will eventually slow the body's motion if it were freely floating). The added mass and damping terms are very important in understanding the relative motions and response of marine vessels (both surface and subsurface) in waves, currents and maneuvering.