抄録
Objective. In order to evaluate the damage to inhabitants along the line resulting from conventional railway noise, it is necessary to evaluate influence by the noise quantitatively to consider the pattern of the noise in addition to the noise level. In this paper, damage by the railway motor noise is quantified taking driving pattern into consideration as well as noise level based on traffic noise evaluation method of LIME2.
Results and Discussion. As a result of comparison of damage caused from noise by railway carriages equipped PMSM and IM through the life cycle, it is confirmed that 3dBA of equivalent continuous A-weighted sound pressure level based on actual measurement is corresponded to 56% reduction of health damage. In addition, as a result of integrated evaluation of plural environmental effects, the influence of damage by noise is 91% and 94% of total in the case of PMSM installed carriage and IM, respectively.
Conclusions. In this paper, an evaluation model to quantify damage by railway noise is developed by reflecting the driving pattern of carriages based on LIME2. Using this model it is proved that the influence caused from noise is relatively high, therefore it is meaningful to involve the effect of noise to the total environmental analysis. In addition, in order to reduce the environmental impact, for the large influence in the operational stage, it is effective to control fuel consumption and the discharge of the environmentally load material in the operation stage.
