The ONR Ship Structural Reliability Program

摘要

The Office of Naval Research has developed a program to advance the science and technology of ship structures, called the ONR Ship Structural Reliability Program. The program has the strategic long-term vision of the development of technologies suitable for cradle-to-grave life cycle performance analysis and monitoring of ship structural systems, particularly aluminum structures. Research into aluminum is important because 50 percent of the ships to be built by the U.S. Navy in the next five years will be fabricated either entirely or partially (deckhouse) of aluminum. There are six areas of study under the current structural reliability program: 1. reliability-based structural performance prediction 2. fatigue crack initiation and growth 3. structural health monitoring (SHM) 4. vulnerability of aluminum ship structures to blast effects 5. ice loads 6. hydrodynamic structural loads. In addition, previous work has addressed the areas of sensitization of 5xxx-series aluminum structure, enhancing the U.S. Navy's Ultimate Strength computer program, ULTSTR, to include analysis of aluminum structure, development of the fatigue crack growth prediction tool XFEM, and development of a quantum mechanics-based atomistic framework for crack growth analysis.