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류재문 충남대학교 1992 論文集 Vol.15 No.1
A numerical method to compute the viscous flow around the stern including the wake is presented. Thin boundary layer equations of integral type has been adopted for the numerical computation under small cross flow assumption. The iterative procedure based on the surface transpiration method has been applied to satisfy the condition on the boundary surface between the outer potential flow region and the inner viscous flow region, namely the boundary layer and wake. The numerical results for two examples, Wigley hull and Series 60, indicate the possibility of solution of the stern flow including the wake without any divergence within the field of the boundary layer theory.
퇴행성관절염 노인환자의 온열요법 및 근관절운동이 통증반응, ROM, 일상활동기능장애, QOL에 미치는 효과
류재문,최지원,Ryu, Jea-Mon,Choi, Ji-Won 대한물리치료과학회 2004 대한물리치료과학회지 Vol.11 No.4
Muscle stiffness, pain discomfort in daily activities are cardinal symtoms on arthritis. To reduce these symtoms, a nonequivalent one-group pre & posttest experiment was carried out at a rural community health post area in kwangju province during eight weeks(from 25th of January to 20th of March, 2002) The subjects were sixteen old (60-80) with osteoarthritis. And to reduce the level of pain, discomfort in daily living and to increase that of life satisfaction, 25-30minutes of muscle-joint exercise followed by 25-30minutes of local heat therapy were done three times a week. The total experimental period extended at 12 weeks and the total 36 times it executed 1. The retrogression characteristic osteoarthritis elderly with local heat and a muscle joint exercise was the telegram which it receives and after receiving, the score of the paindaily activity function appeared to the lead, there was a difference which considers statistically, this constriction was supported.(Z=4.947, p<0.0001) 2. The retrogression characteristic osteoarthritis elderly with local heat and a muscle joint exercise was the telegram which it receives and after receiving, the score of daily activity function appeared lowly, there was a difference which considers statistically, this construction was supported.(Z=2.7226, p<0.0279) 3. The retrogression characteristic osteoarthritis elderly with local heat and a muscle joint exercise was the telegram which it receives and after receiving, there was not a difference where the quality of life considers statistically, this construction was rejected.(Z=-1.2087, p>0.2171)
A study on the impact load acting on an FPSO bow by steep waves
홍삼권,류재문,정동우,김희택,이동연,서종수 대한조선학회 2017 International Journal of Naval Architecture and Oc Vol.9 No.1
Various offshore structures such as FPSO, FSO, Semi-submersible, TLP and Spar are operated to develop offshore oil and gas fields. Most of the offshore structures shall be operated over 20 years under the harsh environments at sites so that the offshore structures should be designed to endure the harsh environments. In this study, the effect of the impact load (so called slapping load) by the steep waves acting on the FPSO bow is investigated through the model test. For measurement of the impact pressures on the frontal area, a bow-shaped panel was fabricated, and installed the pressure sensors on the bow starboard side of the model FPSO. During the model test campaign, the impact load was investigated using the steep waves with Hs/l greater than 1/16 of the representative wave condition. Consequently, it is confirmed through the model test that the impact loads acting on the FPSO bow are significantly increased with the steep waves (Hs/l > 1/16) than the representative wave conditions of a maximum significant wave height and a pitch forcing period. Therefore, for safe design of North Sea FPSO, it is necessary to consider the steep waves in addition to the representative wave conditions and to be applied as proper structural load. Also, the effect of random seeds in irregular waves should be considered to build the safe FPSO. Copyright © 2016 Production and hosting by Elsevier B.V. on behalf of Society of Naval Architects of Korea. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).