CUVX Design Report - the AOE home page - Virginia Tech

CUVX Design – VT Team 2 Page 60Figure 51. Bending moment diagram for full load hogging load caseCUVX HI3 adequacy parameters shown in Figure 52 and Figure 53 show the final minimum negative valuesfor panel failure modes for all load cases. These were the only areas of negative adequacy. In all cases, both forpanels and beams, the worst values occurred in the sagging load case.Only two side shell strakes, a small region near midship in the bottom and a few scattered panels have slightlynegative adequacy parameters. In most cases the failure modes are panel collapse stiffener flexure (PCSF) with thestiffener in tension. An increase in stiffener size is the likely solution. This will be accomplished in the next designiteration at the same time as scantling reduction in over-designed areas to reduce structural weight. Otherwise thestructure has adequate strength to satisfy the USN quasi-static load criteria. A probabilistic analysis using NorthAtlantic wave energy spectra will also be performed in the next design iteration.Figure 52. Negative panel adequacy for all load cases