The development of vibration transmissivity calculation of full-foam seat cushions 2000-05-0351
Full-foam-type seat cushion for vehicle is made of such elements
as panel, foam pad, and surface seat and each element individually
effects on dynamic vibration comfort performance during riding. The
most important requirement is to reduce resonance magnification of
seat close to 6 Hz, which is the natural frequency of the human
body''s internal organs.
Conventionally, the prediction of the resonance frequency
characteristics of the seat cushion is seldom done by calculation
at design stage before evaluation of prototype test.
This paper reports that it becomes possible to predict vibration
property of seat cushion at design stage by solving vibration
equation, which is obtained by replacing seat cushion structure
with vibration system model having spring element and damping
element equivalent to designed seat cushion and by making graph of
resonance frequency characteristics using calculation program
provided in this paper.