26 カオス解析による作業のための歩行路環境の安全性評価に関する研究

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The Japanese occupational accidents has been continued to decrease since the Industrial Safety and Health Law was established in 1972. But, in recent years, number of occupational accident at shipyard is shifting from approximately flat to increase, and also the probability of death accidents is still high as compared with them in other industries. Besides, Industrial Safety and Health Law was revised in 2005, this law recommends implementation of risk assessments for promotion of occupational safety management to the broad industrial sectors. The falling type accident is deal in this paper mainly, because this type of accident is happen 30% of occupational accidents in shipyard. This feature of falling type accident breaks out during walking on circumstances of ship construction fields, according to analysis of our constructed occupational accident database. For understanding the factors of introduction to harmful walking mode, experiment on transferring platform mock-up is attempted. And the motion of center of gravity of human body under some harmful walking environmental condition is measured by motion capture technology on video imaging analysis. The relationship with the fluctuation property of traces of center of gravity of human body and walking environment is found out, through these experiments and fluctuation analysis by method of recurrence plot on applied chaos theory. This numerical calculating methodology is proposed as evaluation of safety of walking environment on improvement of occupational health at shipyard.

26 カオス解析による作業のための歩行路環境の安全性評価に関する研究

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