B3-FH13A required space for piping and monitoring details Bevel-helical gear reducers B3

Flender/Flender Gear Units/Bevel-helical gear reducers B3

SA in the early 1' to standardize FEA methods across con- tractors for the major Aerospace projects such as the Moon program and -1. It was commercialized in the early 1'. NE NASTRAN was introduced in the mid 1' with the emphasis on the PC environment to avoid the expense of the mainframe computing bottlenecks that many large contractors were experienc- ing. Since then NE Nastran has gone from strength to strength and has achieved great success in the Maritime market- place. The maritime environment can be very harsh and unforgiving to designs that are not able to absorb the punishment meted out. Typical challenges include: Stiffness high performance yacht mast designed for the Americas Cup or war- ship communications mast must both be able to withstand the high wind and inertia loads without being overly flexi- ble. Failure to achieve required stiffness will result in performance degradation and even promote other failure modes. Noran Engineering has been involved in non-linear analysis for these vessels where the effect of tension stays is vital to the design. Strength This is primary concern in all designs. NE Nastran has been used to investigating the strength of all classes of vessels under sea loading, from hog- ging and sagging of tankers spanning adverse wavelengths to the structural integrity of high-speed patrol boats. One of the key advantages of the FEA method is that whole vessel model can be created relatively quickly and then wide range of loading conditions can be studied. The survey techniques using contour plots in the NE Nastran post processor allow rapid assessment of design or modification suitability. Vibration The ocean is dynamic environment and the propulsion and transmission sys- tems of vessels are often complex in