Accession Number : AD0438143

Title :   DEVELOPMENT OF AUTOMATICALLY HARDENING SHOCK MOUNTS.

Descriptive Note : Final rept.,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : Oleson,S. K. ; Eige,J. J.

Report Date : SEP 1963

Pagination or Media Count : 49

Abstract : Initial applied research was conducted to provide a means of temporarily placing shipboard equipment in a hard-mounted posture during explosive attack. The approach is based on the use of a class of electrically active fluids which became solid or semisolid when an electric field is applied. To make the action entirely automatic, the electric field is supplied by piezoids that are activated by the shock wave produced by an explosion. The applied research consisted of three principal tasks: (1) design of suitable electrohydraulic damping mechanisms based on the properties of electric-fluids now available; (2) application of piezoelectric ceramics to supply the electric field required by a given electrohydraulic damper based on the acoustic energy available in the shock wave; and (3) construction and testing of an electrohydraulic device demonstrating the overall principles of an automatically hardening (auto-hardening) shock mount system. The investigation showed that: (1) electrohydraulic dampers can be designed to meet the requirements of small shock mount systems (0 to 2,000 lb static loads); (2) electrohydraulic dampers for large shock mount systems (2,000 to 10,000 lb static load) require further study and compromises in (a) the permissible space which can be allotted for dampers, (b) the viscous damping inherent in the device, and (c) the electrical energy required by the damper. (Author)

Descriptors :   (*SHIP AUXILIARY EQUIPMENT, VIBRATION ISOLATORS), (*VIBRATION ISOLATORS, PHYSICAL PROPERTIES), (*UNDERWATER EXPLOSIONS, VIBRATION ISOLATORS), (*FLUIDS, VIBRATION ISOLATORS), (*ELECTRICAL PROPERTIES, FLUIDS), ELECTRIC FIELDS, SILICON COMPOUNDS, DIOXIDES, GELS, PIEZOELECTRIC TRANSDUCERS, VOLTAGE, EXCITATION, PLASTIC PROPERTIES, SHEAR STRESSES

Distribution Statement : APPROVED FOR PUBLIC RELEASE