장곡리 海濱의 모래 移動 現場 調査

이동주(Dong-joo Lee),임병용(Byeong-yong Lim) 군산대학교 수산과학연구소 1996 水産科學硏究 Vol.- No.12

Profile leveling and fluorescent sand tracing were adapted to investig;tte sand movement in Changkori Beach. The results are as follows. 1. It is possible to find out main direction of sand movement by using fluorescent sand tracing. Drift sand moves mainly toward south-east at a speed around 3m/day. 2. It is possible to find out net change of total sand volume by profile leveling. The sand volume decreases about 17,705㎡ and beach Surface lowers 12.295㎜ in average for a suveying period. 3. Some deposit is taken place in the western region and some erosion in the eastern region of beach.

장곡리 海濱의 모래 移動 現場 調査

이동주(Dong-joo Lee),임병용(Byeong-yong Lim) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.3 No.-

Profile leveling and fluorescent sand tracing were adapted to investigate sand movement in Changkori Beach. The results are as follows. 1. It is possible to find out main direction of sand movement by using fluorescent sand tracing. Drift sand moves mainly toward south-east at a speed around 3m/day. 2. It is possible to find out net change of total sand volume by profile leveling. The sand volume decreases about 17,705m² and beach surface lowers 12295mm in average for a suveying period. 3. Some deposit is taken place in the western region and some erosion in the eastern region of beach.

금강하구의 퇴적과정에 관한 연구

신문섭(Moon Seup Shin),홍성근(Sung Kun Hong),장인규(In Kyoo Chang),임병용(Byeong Yong Lim) 군산대학교 수산과학연구소 1998 水産科學硏究 Vol.- No.14

The purpose of this study is to find sedimentation patterns variation in the Geum river estuary. Water circulations are calculated diagnostically from the observed water temperature and salinity data and wind data and tidal residual current. Three dimensional movements of injected particles due to currents, turbulence and sinking velocity are tracked by the Euler-lagrange methoed.

鐵筋콘크리트 逆T型 擁壁構造物의 最小經費 設計

林秉龍,林正換 군산대학교 1993 群山水産專門大學 硏究報告 Vol.28 No.1

This study is concerned with the minimum cost design of reinforced concrete retaining wall using strength design method. The constrained optimization problem is formulated in terms of seven design variables and sixteen constraints, with the material and construction cost as the objective function. The solution is derived by a feasible direction method using ADS. It is shown that the design variables are satisfied with all constraints and the design process are automatically treated by computer. Therefore, the minimum cost algorithm developed may be recommended to achieve the minimum cost design of reinforced concrete retaining wall.

지반의 고유진동주기를 고려한 사장교의 지진해석

임병용,한재익 群山大學校 1997 論文集 Vol.25 No.-

The dynamic responses of cable-stayed bridge subjected to seismic load are presented here, and they are considered as seperating the horizontal load and vertical load, but other simple bridges are considered horizontal load. The numerical analysis model is somplified, which is consist of thirty-one mass-point on the girder and the tower of cable-stayed bridge, and the seismic load is sine-wave function which is varied by the time, and the amplitude and period of which are equal to the maximum acceleration and the period of the vibration mode of the ground. Estimating the result of numerical analysis, as the maximum acceleration is increased, the deflections and the sectional forces of bridge are increased linearly, and as the period of vibration mode of the ground is varied, the deflections and the sectional forces of bridge are differ greatly from each other. And the maximum dynamic responses are on the period of the ground which is equal to period of vibration mode of the structure. Thus, these factors must be considered in designation of cable-stayed bridge.

破壞確率에 따른 不靜定構造物의 形狀最適化

林秉龍 群山大學校 1996 論文集 Vol.23 No.-

本 硏究에서는 分割技法에 의해 破壞確率을 考廬한 不靜定 構造物의 形狀最適化이다. Level 1Ⅰ에서는 破壞確率을 考廬하여 斷面을 最適化하고 Level 1Ⅱ 에서는 Powell法의 一方向 査技法에 의해 目的函數만이 最少가 되도록 하는 技法을 導入하여 形狀最適化를 試圖하였다. 이 경우 作用荷重 및 設計應力을 確率變數로 取하였다. 數値例를 通하여 다음의 結論을 얻었다. 1. 形狀最適化로 重量을 相當히 減少시켰으므로 形狀最適化는 經濟的인 設計로 思料된다. 2. 形狀이 固定된 경우의 最適解는 確率制限係數에 따라 一定比率로 減少하였다. 3. 形狀最適化 경우 靜定構造物은 確率制限係數에 따라 一定比率로 減少하여 最適化에 到達하였으나 不靜定構造物은 이에 無關하였다. This study is the shape optimization with with the probability of failure constraints by decomposition technique. In the first level the cross-sectional area of the truss member is optimized by considering the probability of failing constraint. In the second level, the geometric shape is optimized utilizing the unidirectional search technique of the powell which it possible to minimize only the objective function the shape optimization is performed by treatment only the applied load design stress as random variables. In the two numerical example with reference to the truss, the following conclusions are obtained. 1. Since the weight of plane truss structures was decreased by the shape optimization considerably, consequently, the introduction of probability theory into the shape optimization of plane truss structures is thought economical nought to be encouraged in actual construction. 2. In the configuration of the truss structures being fixed the optimal values are proportonal to the limits of a prescribed probability of failure. 3. In case of the shape optimization of truss structures the optimal values of statically determinate truss structures are proportional to the limits of a prescribed probability of failure, but the optimal values of statically indeterminate truss structures are independent upon the limits of prescribed probability of failure.

偏心距離에 依한 水平角 誤羞에 關한 考察

林秉龍 군산대학교 1979 群山水産專門大學 硏究報告 Vol.13 No.3

This study has a purpose of correcting horizontal angle to computer reduction to center by means of distance-eccentricity of triangulation point, using fixed triangulation point and distance of eccentricity. The results are obtained as follows. 1.The error of horizontal angle is increased in proportion to distance-eccentricity. 2.The observational error of directional and horizontal angle have a little influence about the results of computation of reduction to center. 3.Horizontal angle is more influential than directional one on the basis of subtracting true value to corrected one.

彈性 理論에 依한 剛材 構造物의 最適設計에 關한 硏究

林秉龍 군산대학교 1979 群山水産專門大學 硏究報告 Vol.13 No.3

This study is concerned with the optimum design of truss structures using S. L. P, method. The objective function derived in this study is the weight function of truss structures and the constraints of stress and deflection are used as the constrained conditions. The shapes of truss structures is fixed. In the design example, The numerical approach is employed to find the optimum values by computer and its result discussed is represented in the following terms. (1) All constrained conditions is derived by the force method. (2) The error due to linearize the nonlinear model did not exist. (3) The results computated by computer show that the stress constraint controls the design process.

信賴性制約條件을 考廬한 트러스 構造物의 最適設計에 關한 硏究

鄭榮采,林秉龍 군산대학교 1981 群山水産專門大學 硏究報告 Vol.15 No.3

This study is concerned with the optimum design of trusses with the (iced shape depending on reliability analysis. Reliability index(Z) is used for the taking account of reliability constraints. A total weight is considered as an objective function, and each member's stress using reliability analysis is considered as a constained condition. A method of optimization used for the optimum design is SUMT which is used a modified Newton-Raphson method and it is applied to the numerical examples for the 14 bars truss and the 7 bars truss in this study. The results on the numerical example are compared and checked as reliability indice(Z) are 0 and 3 in each structure. Also, under the same design conditions the result on the optimum design of the 7 bars truss and that of the reference (16) are checked for the convergence in this study. Finally, through these numerical analyses, the result of this study is discussed about the analysis of the application stability, the economy of the structural design with reliability constraints and the validity of the algorithm in this study.