DESIGN PROCEDURES FOR SHOCK ISOLATION SYSTEMS OF UNDERGROUND PROTECTIVE STRUCTURES Volume II Structure Interior Motions Due to Directly Transmitted Ground Shock

摘要

This volume presents a method for estimating the motions on the interior of a buried cylindrical shell resulting from directly-induced ground shock caused by the detonation of a nuclear device to aid in the preliminary design of shock isolation equipment.nVarious theoretical models for calculating the free-field waveform are reviewed and the acoustic model is recommended for this purpose. The reasons for this recommendation are enumerated and the methods for applying it are given. Methods for solving the structure-medium-interaction problem are discussed and the normal-mode analysis of the response of an elastic cylindrical shell in an acoustic medium to a specified input pulse is reviewed in detail.nA discussion of ranges of parameters appropriate to realistic problems is included. A thorough explanation of the results of computer solutions for the shell response is presented, and a large number of graphs illustrating the results are included. The results are analyzed to deter-mine the relative influence of the parameters on interior shell motion.nThe application of the method developed is explained and illustrated by sample problems. An appendix contains a Duhamel-integral computer program that can be used to generate results for cases not included in this volume.