On frequency-dependent damping coefficients in lumped-parameter models of human beings

摘要: Abstract A three-degree-of-freedom model of the human body, which included both vertebral and visceral paths between seat head, was formulated programmed for solution using IBM Continuous System Modeling Program. The parameters representing spring stiffnesses damping coefficients were varied until body-to-seat or head-to-seat acceleration ratios converged to existing experimental data at corresponding input frequencies. exhibited linear behavior frequencies up approx. 6 Hz a possible transition region 10 Hz. For 30 Hz, found vary parabolically with frequency.