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천병식(Chun Byung-Sik),임병수(Lim Byoung-Soo),김명진(Kim Myung-Jin) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, the evaluation for utilization of waste landfill was performed by field test to use waste landfill as construction site(Nangido in Seoul). The site where dynamic compaction test was carried out was divided by 4 yards. Yard 1, 2 were not eliminated widening of cover soil and Yard 3, 4 were eliminated it. Dynamic Compaction Pilot Test was carried out by the 15ton heavy tamper with drop height of 20m in Yard 1, 3 and with drop height of 15m in Yard 2, 4. We evaluated the compaction ability, optimum compaction number and noiseㆍvibration through field test, monitoring. To make lise of waste landfill as a construction site, The dynamic compaction method is suitable for using in waste landfill as a construction site among the ground improvement methods.
가솔린엔진의 직동식 밸브계 소음저감 및 음질개선에 관한 연구
황선양(Hwang Seon Yang),임병수(Lim Byoung Soo),임윤수(Lim Yoon Soo),권오준(Kwon O Jun) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The noise generation mechanisms of two types of direct-acting valve train system, employing hydraulic and mechanical lash adjuster(HLA, MLA), were investigated by taking a series of sound and vibrtion measurements. These measurements were focused on valve cam profile, tappet movement and the others in order to identify noise sources and the noise generation mechanisms in a direct-acting valve train. Further experiments established that impulsive noise(Sound pressure level and sound quality) of a mechanical lash adjuster (MLA) can be greatly reduced by optimizing the cam profile and modifying geometries of other noise generating parts without great loss of engine performance and emission.
천병식 ( Chun¸ Byung-sik ),여유현 ( Yeoh¸ Yoo-hyeon ),임병수 ( Lim¸ Byoung-soo ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
In this study, the evaluation for utilization of waste landfill was performed by field test to use waste landfill as construction site(Nangido in Seoul). This site had been formed by dredging the household waste, building debris and industrial waste for fifteen years(78'3 ~93'3). The site where dynamic compaction test was carried out was divided by 4 yard. Yard 1, 2 were not eliminated widening of cover soil and Yard 3, 4 were eliminated it. Dynamic Compaction Pilot Test was carried out by the 15ton heavy tamper with drop height of 20m in Yard 1, 3 and with drop height of 15m in Yard 2, 4. We evaluated the compaction ability, optimum compaction number and noise · vibration through field test, monitoring. As a result, If the countermeasures against vibration and noise by the method utilize, The dynamic compaction method is suitable for using in waste landfill as a construction site among the ground improvement method.