Abstract
A three-dimensional mathematical model of an aircraft seat, occupant, and restraint system has been developed for use in the analysis of light aircraft crashworthiness. The occupant model consists of 12 rigid mass segments whose dimensions and inertial properties have been determined from studies of human body anthropometry and kinematics and from measurements of a production anthropomorphic test dummy. Because of the significant role played by the seat in overall system crashworthiness, a detailed finite-element model of the seat structure is included. The input data are structured so that any aircraft seat can be modeled by providing only nodal coordinates, element cross-sectional dimensions, and material properties. Plastic behavior is simulated by plastic hinges at the beam ends. Comparisons of model predictions with measured data for a dynamic test of an energy-absorbing seat are included.
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