Source identification of abnormal noise caused in diesel railcars through spectrum analysis

스펙트럼 분석을 통한 디젤동차 애상소음 원인규명

This paper presents spectrum analysis technique to identify abnormal noise produced in diesel railcars. Coherence and coherent power spectrum are very useful in determining source identifications. Experiments are applied to two different cars with similar phenomena about the case of stop and running condition. Metal contact in mounting bracket part which is excited by excessive transmission vibration is found to cause abnormal noise.