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Vertical drop tests are commonly used to evaluate the effectiveness of energy absorbing seats in the mitigation of loads resulting from axial impulsive impacts. Crashworthy seats, designed to mitigate energy produced by landmine blast events against tactical vehicles, are often investigated and evaluated with the use of an Anthropometric Test Device (ATD) such as the Hybrid III dummy. Since these ATDs were originally designed to evaluate occupant response in frontal collisions, this paper presents a finite element analysis comparing the response of a Hybrid III dummy model to a human body model, newly modified at Wayne State University, in a vertical loading scenario. Two different seated configurations with varying leg angles for each model were vertically loaded with an acceleration pulse of 120 g for 10 ms. The predicted responses from the two models were compared in terms of the forces and bending moments on the tibia and femur. It has been found that the responses predicted by both models exhibited similar trends, but compared to the Hybrid III dummy model, the forces and moments simulated with the human model gave lower peak values for longer durations.

FINITE ELEMENT EVALUATION OF HUMAN BODY RESPONSE TO VERTICAL IMPULSE LOADING