유한요소법을 이용한 회전식 수문의 구조해석 = Structural analysis of radial gate using the Finite Element Method

다국어 초록 (Multilingual Abstract)

ABSTRACT

This study was prepared for accurate and safe structural analysis of various complex load conditions that are difficult to verify through hand calculations by conduction detailed analysis and weak spot reinforcement through the use of ansys program which is a Finite Element Method for radial gate.
Today, radial gate methods include lattice beam and horizontal beam method, horizontal support beam vertical main beam method, and vertical support beam horizontal main beam method. Of these, lattice beam horizontal main beam method that provides most excellent durability of flood gate and does not require processing of beam was selected.
As such, in design, construction, and maintenance management of large scale hydraulic structures that manage and control water, sufficient stability and durability are demanded.
The flood gate section of the radial gate is in the shape of a circular arc, is supported by hinge axis of the gate arm that has a uniform rotation radius, and is structurally constructed so that it moves up and down based on pistons that function based on windlass cables or a hydraulic apparatus.
In this study, boundary conditions were found by hypothesizing three types of load conditions.
Comparative analysis was conducted using case scenarios in which only design water level pressure is applied, design water level pressure and lifting load are simultaneously applied, and design water level pressure, lifting load, and dead weight are simultaneously applied. Conclusively, it was verified high level of sagging and internal stress occurred in the scenario in which design water level and lifting load are simultaneously applied.
In the Arm Hub, it was found that internal stress is significantly reduced when stiffened plate is used compared to when it is not used.

목차 (Table of Contents)

• < 목 차 >
• 목차 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥i
• ABSTRACT‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥iii
• List of figures‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥v
• List of Tables‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥x
• 제 1 장 서 론 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥1
• 1.1 연구배경 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥1
• 1.2 연구동향 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥1
• 1.3 연구목적 및 내용‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥2
• 제 2 장 수문의 설계조건 및 해석결과 ‥‥‥‥‥‥‥‥‥7
• 2.1 환경조건 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥7
• 2.2 재질 및 허용응력‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥8
• 2.3 부식 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥8
• 2.4 유한요소해석 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥9
• 2.4.1 유한요소 해석모델링‥‥‥‥‥‥‥‥‥‥‥‥‥9
• 2.4.2 하중조건‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥15
• 2.4.3 경계조건‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥21
• 2.5 해석결과 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥26
• 2.5.1 Load case 1(정상상태 정지시) ‥‥‥‥‥‥‥‥26
• 2.5.2 Load case 2(개폐조건)‥‥‥‥‥‥‥‥‥‥‥‥37
• 2.5.3 Load case 3(개폐조건 자중고려)‥‥‥‥‥‥‥48
• 2.5.4 Load case별 비교검토‥‥‥‥‥‥‥‥‥‥‥‥59
• 2.5.5 특정부위에 대한 응력 및 처짐곡선‥‥‥‥‥‥‥62
• 2.5.6 Arm 의 BUCKLING 하중계산 ‥‥‥‥‥‥‥‥‥64
• 제 3 장 Trunnion hub의 유한요소해석‥‥‥‥‥‥‥‥‥66
• 3.1 해석모델링‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥66
• 3.2 하중 및 경계조건‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥68
• 3.3 Trunnion hub의 결과값 비교‥‥‥‥‥‥‥‥‥‥‥71
• 제 4 장 결 론‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥72
• ▣ 참고 문헌‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥7