Scaling for Shock Response of Submarine Equipment
MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING
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Previous analysis and studies have illustrated the difficulty in relating the equipment response at different charge weights for the same shock factor. A recent study 1 has shown a promising scaling law that appears valid over a wide range of charge sizes for the same hull. This report examines how far this range may be extended for both lower charge weights and higher charge weights compares linear and parabolic least square fits of the data which are in the form of equipment peak acceleration response versus shock factor introduces new scaling rules for equipment weight and equipment frequency for single-degree of freedom equipment and points out the hazards of extrapolating over a wide range of shock factor using a limited range of data. Two different model submarine hulls, each designed for approximately the same depth, were used in this study. Each model shows a single-degree of freedom equipment as frame mounted. The earlier study showed that a five frame model is adequate for the purpose of the investigation. These hulls were modeled as lumped parameter systems with a polygon of 36 sides to represent the cylindrical hull. The absolute acceleration of the equipment mass is the measure of response of the equipment as a function of the shock factor for a given charge weight. The variation of the equipment response is examined to establish trends that may affect equipment design.
- Statistics and Probability
- Marine Engineering