http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
현장계측과 수치해석에 의한 쉴드TBM 터널의 지표침하 예측모델
김승철,안성율,이송,노태길,Kim, Seung-Chul,Ahn, Sung-Youll,Lee, Song,Noh, Tae-Kil 한국터널지하공간학회 2013 한국터널지하공간학회논문집 Vol.15 No.3
본 연구는 쉴드 TBM을 적용한 국내 지하철 현장의 계측 자료를 분석하고 기존 이론식에 의한 모델 및 수치해석 결과와의 비교를 통해 보다 간편한 지표침하 예측 S-모델을 개발하였다. 이를 위해 전체 굴착 구간 중, 대표 station을 선정하여 횡방향 지표침하 특성과 굴착 진행에 따른 종방향 지표침하 특성을 분석하였다. 분석 결과를 바탕으로 횡방향 지표침하 형태는 이완영역과 탄성영역으로 구성된다고 가정하고 실제 계측 자료와의 비교를 통해 최대 지표침하량과 침하 영향 범위를 산정할 수 있는 모델을 제안하였다. 이에 의하면 굴착 진행에 따른 종방향 지표침하 형태는 3차 함수 특성과 유사하였으며 각각의 계수를 터널 직경 및 토피고의 함수로 하여 S-모델을 제안하였고, 실제 계측 값 및 수치해석 결과와 상당히 유사한 형태의 지표침하를 얻을 수 있었다. 따라서 본 연구결과를 통해 다소 연약한 풍화토, 풍화암 지층을 통과하는 쉴드 TBM 굴착 시공 시, 간편 S-모델을 이용하여 굴착에 따른 지표침하의 예측이 가능할 것으로 판단된다. In this study, more convenient model(S-model) for predicting ground surface settlement is developed through comparing field monitoring data of the domestic subway applied shield TBM method with conventional equation & numerical analysis. Sample stations are chosen from whole of excavation section and lateral & vertical ground surface settlement characteristic with excavation are analysed. Based on analysis result, through the comparison with actual monitoring data, the model that is possible to compute maximum surface settlement and settlement influence area is suggested with assumption that lateral surface settlement forms are composed relaxed zone and elastic zone. In addition, vertical ground surface settlement patterns with excavation are similar to cubic-function and S-model with assumption that coefficients are function of tunnel diameter and depth is suggested. Consequently, the ground surface settlement patterns are significantly similar to actual monitoring data and numerical method result. Thus, as a result, when tunnels are excavated using sheild TBM through rather soft weathered soil & rock layer, prediction of ground surface settlement with excavation using convenient S-model is practicable.
차체 구조용 섬유직물 복합재의 평면 전단(mode Ⅱ) 층간분리 거동에 대한 시험적 연구
김승철(Seung-chul Kim),김정석(Jung Seok Kim),윤혁진(Hyuk Jin Yoon),서승일(Sung-Il Seo) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Mode Ⅱ interlaminar fracture toughness was measured and fractured surfaces were observed of carbon/epoxy and glass/epoxy woven fabric composites for carbody structure. Woven fabric carbon/epoxy and glass/epoxy composites that made with prepreg and epoxy resin(RS1222) are used in carbody structure of Korean tilting train(TTX) and low floor bus. ENF(End Notched Flexure) specimens having 120㎜ × 20m × 5㎜ shape and 35㎜ initial crack were made with each composites and three point bending tests according to ASTM D790 were conducted for these specimens. Crack lengths in tests were recorded using optical microscope and digital camcorder. NL(Non Linear), 5% offset and Max. load points in load -displacement curves were checked and mode II interlaminar fracture toughness of these points were calculated and compared. Fractured surfaces of specimens were observed using optical microscope and mode Ⅱ delamination behavior of each composites was discussed.
태권도 세부종목별 스포츠자신감이 운동정서에 미치는 영향
김만수(Kim, Man-Soo),김남중(Kim, Nam-Jung),김근국(Kim, Geun-Kook),최성주(Choi, Sung-Ju),김범준(Kim, Bum-Jun),김승철(Kim, Seung-Chul) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.2
This study aims to explore the differences in confidence of players in each Taekwondo event and examine how confidence affects their sports emotion. For this study, 5 universities (H, K1, Y, K2, N) and Taekwond O players were selected among those who participated in competition hosted by collegiate Taekwondo federation in Goseong, Gangwon-do in October of 2014 that lasted for one month. Purposive and convenience sampling methods were used to collect 358 questionnaires, while only 340 of which were used in final analysis as 18 were either incomplete or overlapping. Collected data were processed using PASW 18.0 program, and the following conclusion was reached, First, as to differences in sports confidence and exercise emotion by individual characteristics, all factors revealed significant difference excluding physical preparation of confidence by gender. Second, Regarding year levels, players in their junior year showed more vitality than other those in other year levels. Participants in poomsae and demonstration Taekwondo revealed significantly different level of confidence, composure, enjoyment, pride, and vitality from participants in gyeorugi. Third, sports confidence of Taekwondo players significantly affected some parts of exercise emotion.
신혈관성 고혈압의 진단에 있어서 캅토프릴 신스캔의 의의
김성권(Suhng Gwon Kim),이정상(Jung Sang Lee),고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),최창운(Chang Woon Choi),배상균(Sang Kyun Bae),양형인(Hyung In Yang),김승철(Sung Chul Kim) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.2
N/A To evaluate the sensitivity and specificity of captopril renal scan for renovascular hypertension, we employed the captopril renal scan in conjunction with renal angiography in 81 patients, 159 kidneys, who were referred to evaluate the cause of hypertension. We defined the renovascular hypertension by the criteria of demonstration of renal artery stenosis by angiography, and improvement or cure of hypertension by revascularization. Visual and quantitative evaluation of Tc-99m-DTPA renal scan was performed pre and post captopril administration. The prevalence rate of renovascular hypertension was 40% in comparing with renal angiography, and 70% in confirmed cases. The causes of renovascular hypertension in 81 patients were Takayasu's arteritis, fibromuscular dysplasia, atherosclerosis, essential hypertension, chronic pyelonephritis etc. The sensitivity and specificity of captopril renal scan in comparing with renal angiography were 80%, 86.5%, respectively and also 84.2%, 72.6% in confirmed cases of renovascular hypertension, respectively. The causes of false negative cases were nonfunctioning kidney due to complete obstruction or long duration of disease in basal scan, segmental branch artery stenosis, unknown causes, and suspicious true negative cases without confirmation. The false positive cases were abdominal aortic stenosis or aneurysm, dehydration, unknown causes, and suspicious true positive cases. We conclude that captopril renal scintigraphy is highly sensitive, reasonably specific diagnostic method and comparable to other techniques very favorably.
배드민턴 헤어핀 동작 시 숙련도에 따른 동작의 일관성과 타이밍의 차이
김승철(Kim, Sang-Bum),김상범(Kim, Seung-Chul) 한국사회체육학회 2016 한국사회체육학회지 Vol.0 No.64
The objective of this research is to do a comparative analysis of Differences of Movement Consistency and Timing during Badminton Hairpin between experts & novices, and to present the basic data to improve the technical level of movement. The experiment was progressed by 7 experts and 7 amateurs, and 40 tasks were performed including 20 times of forehand hairpin and 20 times of backhand hairpin. The subject’s movement consistency was analyzed by the position of foreleg when finishing hairpin movement, beating point of shuttlecock and time rate per interval according to all exercise time, and the consistency of two-dimensional task was calculated by two way variable error, while one dimensional consistency was by variable error. For the performance timing, forehand hairpin was divided by 1st section(one step section), 2nd section(slide step section) , 3rd section(two step section), while backhand hairpin by 1st section(one step section), 2nd section(two step section) to measure all exercise time and exercise time per section. With the calculated data, we did independent t-test, and the result of this research is as follows. Result, expert had the high consistency of exercise performance than the amateur, the expert had consistent time rate in 3rd section, while the amateur in the 2nd section. also, the expert had the longer exercise time and exercise time per section than the amateur.
김승철(Seung-Chul Kim),조창민(Chang-Min Cho),정성종(Sung-Chong Chung) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
Identification of servo parameters is critical to fabricate a precision machinery. In this paper, servo characteristics of a linear motor driven servo systems are estimated through the frequency response, ripple force identification and nonlinear friction identification methods. Linear element of the servo is identified through the sine sweeping. Ripple forces are identified through the harmonic fitting method. Nonlinear characteristics of static, Coulomb and viscous frictions are estimated through the current measurement. To verify the reliability of the estimated servo model, real-time experiments are conducted on the linear servo for linear and sinusoidal motion experiments. Experimental results confirm the effectiveness of the developed identification method of linear servos.