철도소음의 방사특성에 관한 연구

초록

In order to control the railway noise, we should know the radiation characteristic of the noise during the train passage. Generally, the major noise sources for conventional trains are classified by the rolling noise and power unit noise in tangent track. In this paper, we describe on a train model that is considered to be a row of point sources to calculate the radiation characteristic. The calculation results are compared with short distance measurement of three kinds of trains (EMU. Mookungwha. Saemaul). It is shown that the radiation character-­istic of the rolling noise that is major noise source of electric multiple unit is dipole type. We know that char-­acteristic of the engine noise is radiated as the cosine type.

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