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한성길,박종관 서울産業大學校 2005 논문집 Vol.54 No.2
In this study, a large pile load test was performed in the deep sand gravel deposit of Nakdong river basin so that the characteristics of the load transfer was identified. The fully instrumented circular bored pile of the diameter 1.5m was placed into the ground below 50m. Under the applied load of 2,400 tonf, the test results of the load transfer showed that 93% of the applied load on the bored pile was supported by the skin friction along the pile shaft. Also, it was revealed that the most of this skin friction mobilized in sand layer underlying clay layer having N-value more than 30. However, if embedded in the stiff sand graval layer, the pile was proven to be sufficient for using as the friction pile.
한성길(Sung Gil Han),신유인(Yoo-In Shin),윤찬헌(Chan Heon Yoon),송철기(Chul Ki Song) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.5
A planetary gear train is more compact and endures greater amounts of transmission power compared to other gear systems. Although planetary gear systems operate in small volumes, they are capable of very high efficiency due to the compact combination of their gears in the planetary gear system. They also have outstanding efficiency of only 3% for power transmission, tantamount to the power loss that occurs in each of the shift stages. Given these advantages, planetary gear systems are used in the driving systems of, which are widely used in automobile transmissions, machine tools, semiconductor equipment, and in other areas in industrial fields. Current structural equipment requires higher efficiency and greater torque levels. According to these needs, we have designed a complex planetary gear system which creates higher levels of torque. In this paper, an evaluation of strength designs for the proposed planetary gear system was conducted to ensure the stability of the gear. In addition, a durability analysis based on Miner"s rule was performed using RS B 0095 device.
이준석,한성길,조홍재,김호경,석광진,김용달,오태석 사단법인 한국자동차안전학회 2024 자동차안전학회지 Vol.16 No.1
With a sustained increase in the number of reported registrations for two-wheeled vehicles and the simultaneous growth of the domestic two-wheeled vehicle market, fueled by the activation of contactless industries and a rising population engaging in recreational two-wheeled vehicles during the COVID-19 era, concerns regarding safety incidents and environmental issues have come to the forefront. While the regular inspection methods and environmental standards for four-wheeled vehicles are becoming more stringent for safety and environmental management, the same cannot be said for two-wheeled vehicles. As the market for two-wheeled vehicles continues to expand, there is a pressing need for improvements in the management and inspection of these vehicles. In this study, we analyze cases of non-compliance from the results of periodic inspections over the past five years, specifically focusing on illegal customizations, exhaust emissions testing, and exhaust noise results. Through this analysis, we elucidate the necessity for enhancing the inspection system for two-wheeled vehicles, drawing parallels with the inspection systems applied to conventional automobiles. The findings of this research contribute to advocating for improvements in the inspection regime for two-wheeled vehicles, addressing the growing concerns related to safety and environmental impact.