APPENDIX A 
Theory of small-amplitude sound pulses 
APPENDIX B 
Theory of gas bubble motion 
APPENDIX C 
Effects of pressure pulse normally incident on an infinite plane plate 
APPENDIX D 
Deformation of a rectangular plastic panel by suddenly applied pressure 
APPENDIX E 
Deflection of a uniform elastic beam on spring supports 
APPENDIX F 
Air blast from underwater explosions 
APPENDIX G 
Gravity waves in the sea caused by explosions 
LIST OF ILLUSTRATIONS 
Pig. 
Surface showing variation of pressure with time and distance eee 1 
Curves showing variation of pressure with time at two fixed points 2 
Curves showing variation of pressure with distance at two fixed times 3 
Empirical curve showing pressure/time variation .+. sec eee 4, 
The reflection of the pressure pulse at an air/water surface ... 5 
Pressure/time variations for a point below the sea surface 600 6 
Pressure/time variations at large angles of incidence with a 
free surface eee eee eee eee eee eee eee eee 6a 
Reflection of pulse at sea=-bed eoe eoe eoe eoe eee eco 7/ 
Pressure/time variation at a point near the seabed eee eee 8 
Glancing incidence reflection of pulse at sea=bed ... occ co 9 
Curves showing calculated bubble motion oe eee eee eco 10 
Calculated pressure/time variation of first bubble pulse SOC 44 
Curves showing the distribution of pressure with depth 
immediately above the explosion eee eee eco eco eee 12 
Resultant velocity of projected water eee eee eco eee eco 13 
Variation in thickness of the initial layer of spray dome eee 14. 
Surface effects of shallow explosions eee ese eee eco coe the 
Pressure pulse incident on unit area of infinite plate ... eee 15 
Pressure on plate when there is no cavitation at plate or in water 16 
Diagrammatic representation of successive stages when plate leaves 
water and subsequently cavitates ese eco eee eco eco 17 
Energy transferred to target from pressure pulse ees cece evo 418 
Essential features of box and drum models) eco eco eee eee 19 
Pressure pulse incident on yielding piston in infinite unyielding = 
wall eee eee eee oeee eee eco eee eee eee eee 
Central plastic deflections of box model target plate .e. ese 241 
Static stress = strain curve for mild steel ... eee eee eos 22 
Simplified stress = strain curve eec eco ee0 eee eoe 23 
Symmetrical section of beam eee eee eee eco e@oe ece 2h 
Plastic bending of simply-supported beam by concentrated central 
load eoe eee eco eee eoe eoe eoce eee eco ece 25 
