Design Of Underground Protective Structures X 4306 PDF Download

This report reviews the major considerations relating to the design of Shock Isolation Systems for use in underground protective structures, emphasizing in particular those areas where special guidance is needed by the facility engineer. The motion of the ground due to nuclear blast, the interaction of the ground motion with buried structures, and the tolerances of typical facility equipment to shock are described and employed to establish the input and output requirements for isolation systems. Analytical methods for determining the dynamic responses of both linear and nonlinear isolation systems are summarized and, for several of the more commonly used configurations, the equations are reduced to simple form. The report suggests the use of the shock response spectrum in a unified approach to the specification of attenuation requirements, equipment shock tolerances and shock test machine selection.