Validating a Finite Element Model of a Structure Subjected to Mine Blast with Experimental Modal Analysis

Report No. ARL-TR-8224
Authors: Douglas Howle, Dmitriy Krayterman, Justin E Pritchett, and Ryan Sorenson
Date/Pages: November 2017; 42 pages
Abstract: The Under-body Blast Methodology (UBM) for the Test and Evaluation (T&E) program was established to provide a capability for the US Army Test and Evaluation Command to assess the vulnerability of vehicles to under-body blast. Finite element (FE) models are part of the current UBM for T&E methodology and must be validated. The UBM for the T&E program has completed efforts to validate soil models but not structural dynamics models. Modal testing of a V-hull structure was performed. The modal test setup, execution, and results obtained are presented. Changes made to the existing FE model of the structure as part of the validation process are presented. The effect of the model validation on the shock response of the structure during a mine blast simulation was quantified using a correlation and analysis (CORA) tool. In general, all models—whether validated or nonvalidated—provided acceptable predictions of structural response.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2017