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TRANSIENT RESPONSE OF A THIN ELASTIC CYLINDRICAL SHELL TO A MOVING SHOCK WAVE
DEPUTY COMMANDER AEROSPACE SYSTEMS INGLEWOOD CALIF
Using the theory of thin elastic shells, the transient response of a finite cylindrical shell of circular cross-section subjected to a moving pressure discontinuity is obtained for the axisymmetric case. The response to a moving shock front with a decaying pressure intensity behind the front may be obtained by using this solution and the superposition integral. From the solution for the moving pressure discontinuity, the response of the shell, when the impulsive load is applied simultaneously over the entire shell, is obtained by the use of a limiting procedure. The analysis of the response of the shell to a moving pressure discontinuity shows that if one-half the period of the fundamental vibration is less than 0.87, equal to 1.12, or greater than 3.4 times the time required by the pressure discontinuity to cross the shell, the corresponding dynamic loading factors based on deflections may be taken as 1.78, 2.50, and approaching 2.0, respectively. The upper bound of the dynamic loading factor is 2.50 for this investigation, and is contrary to the commonly accepted notion that it cannot be greater than 2.0. Author
AF04 647 930