APPENDIX A 

 SAMPLE OSCILLOGRAMS 



The two oscillograms of Figure 11a indicate the variation of pressures on the bottom 

 plating with time and the consequent strains and deflections in the plate. The response to 

 slamming is also indicated in the oscillograms of pitch acceleration and hull girder stress 

 amidships in Figure lie. 



The maximum peak-to-peak variations in stress measured in the keel 15 in. aft of 

 Frame 23 were 3500 psi, associated with presently undefined higher modes of hull structure 

 which were excited subsequent to slamming at the bow. 



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