3. Parametric Simulations of the BARC Model in SDOF and MIMO Configurations for Estimating Service Environment Severity

Multiple single-axis vibration tests are commonly linearly superposed as a multi-axis test. However, due to cross-axial responses in single-axis, the net response of multiple single-axis vibration tests results in an overestimation of the severity of the service environment. In practice, over-testing has been a result of the limitations associated with physical experimentation, which indicates a need to improve simulation methods and accuracy of current lifetime test strategies. In this chapter, single- and multi-axis experimental vibration tests of the Box Assembly with Removable Component (BARC) model are simulated with implicit and explicit methods using the commercial FEA tool ABAQUS, where the multiple observed outputs are vibrational responses in the three translational degrees of freedom. The model looks to validate physically obtained experimental data by replicating certain boundary conditions and service environments.