ONR Workshop on Nonlinear Sea Loads and Ship Response: A Basis for ShipStructural Design Held in Ann Arbor, Michigan on July 7-8, 1994

摘要

The ONR Sea Loads-Ship Response (SLSR) program includes research areas related tononlinear hydrodynamics, nonlinear dynamics, structural fatigue, elastic and plastic structural deformation, and a probabilistic or reliability-based analysis of ship structural design. Experts in hydrodynamics (SAIC, MIT, AMI, and UofM) explained that by using various nonlinear or partially nonlinear models, computer codes are capable of determining hydrodynamic loads, excluding bottom impact or flare slamming, in random seas. However, given the success of recent planing hull studies, the extension of planing hull hydrodynamics to the impact problem should be straightforward thus allowing for the complete hydrodynamic loads time history in extreme seas to be made. From these time histories, the design hydrodynamic and inertial events can be determined. Structural experts (CDNSWC, NAVESEA, Ross and McNatt, and ABS) explained how the hydrodynamic and inertial loads are currently estimated and used in the structural design of ships, both naval and commercial. Finally, experts in reliability, virtual reality, and simulation (UofC, NRC, and UofM) gave examples of how the product of the SLSR program could fit into a larger computer environment where simulation-based designs incorporating probabilistic methods would be possible.