The Ship Structure Committee announced the publication of three new research reports. The new research reports are Structural Optimization for Conversion of Aluminum Car Ferry to Support Military Vehicle Payload, Comparative Structural Requirements for High Speed Craft, and Deterioration of Structural Integrity Due to Chemical Treatment of Ballast Water. The Ship Structure Committee (SSC) is an interagency committee that sponsors ship structure research projects. Its members include the American Bureau of Shipping, Defence Research Development Canada, Maritime Administration, Military Sealift Command, Naval Sea Systems Command, Transport Canada, U.S. Coast Guard and the Society of Naval Architects and Marine Engineers.
Structural Optimization for Conversion of Aluminum Car Ferry to Support Military Vehicle Payload - focuses on comparison of the global loads, secondary slam loads and vehicle deck loads along with the structural requirements to resist these loads. The report also presents a summary of the finite element analysis work that was developed to investigate the impact of the military payload on the vehicle deck structure. This was of particular interest because the nominal tire footprints for many vehicles are significantly greater than the stiffener spacing, which violates typical assumptions for the design of plate structure subjected to wheel loads.
Comparative Structural Requirements for High Speed Craft - contains a general overview and comparison of the application, requirements and methods for the structural design of high speed craft used by IMO, ABS, BV, DNV, GL, LR, NKK and RIN. The comparison included (craft classed, service restrictions, speed and size ranges covered by the codes, performance based on prescriptive design standards, and key parameters - hull pressure loads, section modulus requirements, etc.) This study was limited to the calculation of the scantlings required by the rules.
Deterioration of Structural Integrity Due to Chemical Treatment of Ballast Water - investigates the effects of SeaKleen and PeraClean Ocean on coating systems, and on bare steel, in simulated environments. The corrosion testing with each agent was carried out for 30 days using water of 15ppt and 35ppt salinity. Four ballast tank conditions: submerged, humid, buried, and splash zones were also simulated in the present corrosion testing program. Testing demonstrated the potential for increased corrosion from oxidizing agents.