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한국형 틸팅열차용 Flexible 소결 브레이크 패드 적용 연구
구성모(Seong-Mo Ku),이동균(Dong-Kyun Lee),고태환(Tae-Hwan Ko),나종태(Jong-Tae Na),김상호(Sang-Ho Kim) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Metallic sintered brake pads are often applied to Mid/High Speed Train due to its high strength and thermal characteristics. Because of its imbalance contact between discs and pads can greatly influence the life span, one sided wear, discs attack/crack and threat the safety of the train during operation. In this research, we analyzed pressure/temperature distribution between brake pads and disks. Analyzed data had been verified and modified to conduct further tests of Flexible brake pads with small/full-scale dynamo test. Flexible brake pads were installed to TTX train to conduct further tests to identify the differences between Rigid brake pads and Flexible brake pads. In result, Flexible brake pads showed outstanding disk thermal stability, one sided wear, noise and life of pad than rigid brake pad.
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김진구 ( Kim Jin Gu ),최정일 ( Choe Jeong Il ),장대수 ( Jang Dae Su ),나종태 ( Na Jong Tae ),김용억 ( Kim Yong Eog ) 한국수산과학회 2003 한국수산과학회지 Vol.36 No.5
N/A Distribution of ichthyoplanktons and its relation to environmental factors (temperature, salinity, chlorophyll a ) around the Youngsan River Estuary of Mokpo, southwest coast of Korea were investigated based on the samples collected bimonthly from February to December, 2001. Unidentified fish eggs were most abundant 1,345 eggs/100㎥ in August, while eggs of Erzgraulis juponicus were most abundant 63 eggs/ 100㎥ in June. A total of forty species of fish larvae and juveniles belonging to the twenty families under six orders were caught, with six gobiids, four icefishes, four croakers and three herrings being represented. Fish larvae and juveniles peaked 17,757 inds./100 ㎥ in August, which consisted of 91.02% of gobiids, 3.69% of gunncls and 3.67% of icefishes, and they were most abundant 7,467 inds./100 ㎥ at St. 7. Cluster analysis based on the individuals of fish larvae and juveniles showed that six months were classified into two groups at the dissimilarity 70, the first was composed of June and August and the second was February and December and April and October were not clustered with any other months. In August when species diversity index was the highest, eight stations were classified into two groups at the dissimilarity 70, the first was composed of St. 1, 3, 4, 5 and 8 and the second was St. 6, 7 and 2. As a result from correspondence analysis, there is no effect of the environmental factors with a density of fish eggs and larvae, but correlation could be found between a density of fish eggs and chlorophyll α.
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