Presented by the SNAME Technical & Research (T&R) Committee in collaboration with its Hydrodynamics, Structures, Ship Design, and Ship Production Committees
The Technical & Research (T&R) Committee in collaboration with its Hydrodynamics, Structures, Ship Design, and Ship Production Committees is embarking on a series of monthly webinars to inform the ship design and shipbuilding community of the state-of-art of predicting seaway loads and their crucial impact on ship design and construction. The webinar series will also identify shortcomings of existing prediction methods and conclude with an in-person workshop to gain consensus on drafting a roadmap for developing reliable methods for predicting seaway loads in early-stage ship design. The workshop is currently planned to be held as part of the SNAME Maritime Conference in San Diego in September 2023.
The first webinar will focus on understanding the multiple design objectives that must be considered simultaneously and finding the optimum balance between the targeted objectives. For early-stage naval ship design, however, ship structural design is a minimum weight solution (driven by a weight-based cost model) to essentially quasi-static structural performance objectives. However, the real-life operational environments for a U.S. Navy ship – like seaway loads - are highly stochastic, dynamic, and constantly varying for ships that are forwarded deployed 24/7 around the world, often in extreme environments. In addition, affordability in terms of work content or total ownership costs must be one of the targeted early-stage structural design objectives that drive the optimum solution – a robust structural design.
The context is that of the early stages of ship design and is the view of an experienced naval ship design practitioner, who also was the US Navy’s technical authority for ship hydrodynamics. The presentation starts with a series of statements on the disadvantages and nature of light-weight ship design like Take Off Tons Smartly (TOTS)-a complete failure on CG 52 Class. The presenter has a firm conviction that robust structural design is key to producing any initial ship concept design option as part of a properly conducted requirements determination and design space exploration. Given the power of high-performance computers more physics-based, higher fidelity modelling is both desirable and now possible in early-stage ship design, particularly for robust structural design.
The presentation will conclude with a summary of future webinars on Prediction of Seaway Loads.
ALL ARE WELCOME!
President, Ship Design USA, Inc.,
SNAME Honorary Vice President, Life Fellow
SNAME Chair of Ship Design Committee
(Former, Chief Naval Architect of US Navy)
Adrian S. Onas, PhD
Professor of Naval Architecture
SNAME Chair of Hydrodynamics Committee
Seaway Loads Prediction Project Lead