Abstract
In this paper, the test fidelity measure of analytical crash pulses is defined by the magnitude of an energy-momentum, (E-M), metric distance of an analytical pulse with respect to a reference, (test), pulse. The energy-momentum metric is defined and applied to calculate (E-M) metric distance of three analytical crash pulses from each other and from the test pulse. The pulses are for 35 mph. 90° rigid barrier front crash event for an identical vehicle. The three analytical pulses are generated by finite element analysis, FEA, using three different finite element models, FEM, and different solution techniques. The (E-M) metric distance of the pulses is shown to be a measure of the test fidelity of the analytical pulses. The test fidelity of the analytical pulses is defined as the ability of an analytical pulse to predict the occupant injury predictions close to the ones measured in the actual hardware test. It is shown that the crash pulse with the smallest (E-M) metric distance from the test will yield the occupant injury predictions closest to the ones yielded by the test. The test fidelity of analytical pulse will, in turn, allow to evaluate the ability of an FEM to produce high fidelity crash pulses. It is shown that high test fidelity crash pulses can be obtained by using relatively simple finite element models.
High-fidelity finite element models of composite wind turbine blades with shell and solid elements
