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TABLE OF CONTENTS 



page 



ABSTRACT 1 



INTRODUCTION 1 



PART 1 . DESCRIPTION OF A COMMON CASE PRESENTED FOR ORIENTATION ... 2 



THE WAVES OF PRESSURE PRODUCED BY A NON-CONTACT 



UNDERWATER EXPLOSION "... 2 



PRIMARY SHOCK WAVE AND AN AIR-BACKED PLATE: 



A TYPICAL SEQUENCE OF EVENTS 3 



Primary Shock Phase 3 



No Cavitation: The Tension Phase 9 



Cavitation at the Plate: The Free-Flight Phase 10 



PART 2. THE VARIOUS TYPES OF ACTION BY A SHOCK WAVE 12 



THE FOUR CHARACTERISTIC TIMES 12 



THE CASE OF LOCAL ACTION 13 



NON-COMPRESSIVE ACTION ON A TARGET 1*+ 



CONDITIONS UNDER WHICH CAVITATION MAY OCCUR 15 



THE BERNOULLI PRESSURE AND THE DEVIATION FROM HOOKE'S LAW 17 



PART 3. THEORY OF A PLANE TARGET 19 



PRESSURE ON AN INFINITE PLANE 19 



MOTION OF AN INITIALLY PLANE PLATE OR DIAPHRAGM 



OF UNLIMITED LATERAL EXTENT 21 



PLATE OR DIAPHRAGM OF FINITE EXTENT 



SURROUNDED BY A PLANE BAFFLE 22 



FINITE PLATE OR DIAPHRAGM WITH NO BAFFLE 23 



MOTION OF THE FREE SURFACE OF A LIQUID 2k 



IMPULSE PER UNIT AREA DUE TO THE WAVES 25 



THE PROPORTIONALLY CONSTRAINED PLATE OR DIAPHRAGM 26 



The Non-Compresslve Case 29 



Some Simple Types of Proportional Constraint 29 



THE REDUCTION PRINCIPLE 32 



IMPULSIVE EFFECTS 3*+ 



Steady Pressure Suddenly Applied 3k 



Impulsive Pressure 36 



MOTION OF A PLATE OR DIAPHRAGM CONSTRAINED ONLY AT THE EDGE .... 37 



CAVITATION AT A PLATE OR DIAPHRAGM 38 



The Impulse k^ 



A Proportionally Constrained Plate Ul 



