Uncertainty analysis for surface ship subjected to underwater detonation
Sonjoy Das and Roger Ghanem
Proceedings of the IMAC-XXII Conference & Exposition on Structural Dynamics, Dearborn, Michigan, 2004
In reality, the observed behavior and predicted behaviors of any physical phenomenon exhibit differences which can be attributed to lack of knowledge regarding the true physical principles governing that behavior. The discrepancy between the predicted and measured behaviors clearly depends on the assumed theoretical models used to approximate the true physical phenomenon. The present study investigates the response behavior of an infinitely long plate subjected to underwater detonation considered to be a series of interacting events, each governed by a different physical mechanism. Uncertainties in the parameters associated with the theoretical models approximating each of these complex physics are considered by analyzing each model individually. Combining all these models yields the response of the structural component subjected to a comprehensive representation of the underwater detonation phenomenon. The proposed method makes use of existing simplified approaches, typically used to analyze the archetypically deterministic system. Estimates of the sensitivity of response statistics with respect to statistics of the parameters are evaluated. These permit the assessment of the accuracy with which statistics of the parameters must be estimated, and hence the amount of data required to achieve this accuracy.
This page was last updated on 01/30/2009 11:41:03 PM -0800