Bevel-helical speed reduction gearbox B2 Fan with radial shaft seal Radial shaft seal Tac B2-FV13-B

Flender/Flender Gear Units/Bevel-helical speed reduction gearbox B2

ntegrated pre- processor. The DDAM interface in par- ticular has been widely praised for its simplicity and convenience when deal- ing with confidential data. Impact due to ship collision or slam- ming of high speed craft can be studied using the nonlinear capabilities of NE Nastran. Key here is the ability to define general 3D contact surfaces between structural components or sea surface. Fatigue The survival of vessel or offshore structure throughout its life is evaluated by conducting fatigue analysis using NE Fatigue. The important ingredients here include defining the - curve applicable to the steels being used. This comes down to aligning the - curve to the steel classification levels, both for commercial vessels working to Certification Codes and Naval vessels working to naval requirements. The other data needed is the loading history of the vessel. This is very complex for vessel which travels across range of oceans. NE Fatigue allows the creation and matching of loading spectra or time history events that match the various definitions. Where critical sites are to be investi- gated such as early cracking zones, weld failures etc., NE Nastran Fracture Mechanics is used to evaluate the stabil- ity of the crack to see if there is likeli- hood of propagation. Composite Most maritime applications involve ferrous materials, however lighter patrol vessels, surface effect vessels and yachts use large composite content. NE Nastran is able to model complex ply lay-ups, using real draping techniques if required, to map accurately the charac- teristics of the composite structure and its response. Composite failure criteria can be used to assess the strength of the structure and visualize the stress or strain on layer by layer basis. design 'ply book'