人体ダミーを目指した柔軟体の数理モデルの構築

抄録

When evaluating riding comfort of vehicles, sometimes human dummy developed by spring-mass-damper system is used to avoid individual variation. However, because the human body is continuum, such kind of dummies cannot completely represent the vibration characteristic of the human body. Therefore, to represent vibration characteristic of human body as continuum, new types of dummy developed by soft structure filled with fluid, which were defined as aqua dummy, were contrived and as the first step, vibration characteristic, especially apparent mass, of the dummy was examined by simulation and experiment. However, because the simulation of dummy's vibration characteristic was calculated by two dimensional model, although aqua dummy was practically a three dimensional structure, the result of the simulation was different from the experiment's result regarding apparent mass. Therefore, in this paper, the new simulation model in the three dimensional calculation is constructed to represent the vibration characteristic of aqua dummy exactly, and reveals that the parameters of the structure have a big influence on dummy's vibration characteristic. Moreover, the result of calculation by the new model applied to two vibration experiments is found to approximately accord with the result of experiments regarding not only apparent mass and the primary natural frequency but the deformation of dummy. In conclusion, the three-dimensional model is beneficial to produce human dummy of aqua dummy.