Configuration Design of Multi-Hull Systems

Date: 
Friday, January 27, 2017 - 2:30pm
Location: 
3110 Etcheverry Hall
Speaker: 
Professor Ronald W. Yeung

Department of Mechanical Engineering, Ocean Engineering

UC Berkeley

About: 

E-201 Ocean Engineering Seminar Series, Spring 2017

 

2:00 - 2:30pm Beverages & Refreshments

2:30 - 4:00pm Seminar

 

A brief overview of the history of wave-drag prediction is given within the context of thin-ship and other approximating theories. This dominant contribution to resistance is particularly important in high-speed hulls. A fast design tool for a "first-cut assessment" of the interference drag among multi-hulls is described. The interference-resistance formula allows the designer to rapidly survey the total wave drag of a N-hull system as a function of a number of configuration and volumetric distribution parameters. High-speed and yet “waveless” hull system is a possibility, thus offering the advantage of very low GHG emission. Extensions of this approach to hovercrafts and surface-effect ships are discussed. The need for a near-field theory is suggested based on experimental measurements.

 

Biography:

Ronald Yeung received his Ph.D. at UC Berkeley in 1973. Prior to that he staffed as a ship-motion analyst at Litton Ship Systems, Culver City, CA and was an instructor at the Long Beach Naval Shipyard. He taught in the Department of Ocean Engineering at MIT from 1973-82 and joined the UC Berkeley faculty in 1982. Among numerous professional awards, he was an Australian Fulbright-Hayes Senior Scholar (1981), a Georg Weinblum Lecturer (2002-03), and was appointed the Inaugural Chair of American Bureau of Shipping Endowed in Ocean Engineering (2012). His current research interests include: “green ship” by design, roll-motion mitigation, alternative renewable energy from currents, waves, and tides.

 

Hosted by: Professor Simo Mäkiharju, 6179 Etcheverry Hall (makiharju@berkeley.edu)