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급곡선 운송시스템 산악트램 차체 구조안전성 평가를 위한 유한요소해석 및 성능시험 비교 연구
한은광,천준호 한국철도학회 2023 한국철도학회논문집 Vol.26 No.8
This study evaluated the structural safety of the carbody of a mountain railway train, a sharp curve transport system. Research was conducted on the carbody based on structural analysis and load test. The standards cited in the study are EN 12663-1 and urban railway vehicle (road tram) technology standards. Simcenter 3D, finite element analysis software, was used for structural analysis, and Siemens Nastran was used as a solver. The main materials used in the manufacture of the carbody were SMA355BP and SS275. Similar boundary and load conditions were implemented to compare and evaluate the results of structural analysis and load test. In the structural analysis and load test, all stresses occurring on the carbody were within the allowable stress of the material used, and the structural safety of the carbody was confirmed. When comparing the structural analysis results and the load test results of each load condition, the difference of the maximum stress in the vertical load was about 2.7%, and this difference was up to approximately 36% for other load conditions such as compressive load and tensile load.
A Development of High Strength Hybrid Car Bodyshell Using Optimization Algorithms
Hakun Shin,Kwang-Woo Kim,Seung-Tech Kim,Jang-Wook Lee 한국도시철도학회 2017 IJAR Vol.5 No.1
Recently, car bodyshell strength requirements have been strengthened. The need for lightweight car body designs was increased to improve energy consumption efficiency. Accordingly, the purpose of this study is to develope the hybrid EMU bodyshell that uses both steel and aluminium as material to satisfy the two requirements. EN12663-1 P-III was used as car bodyshell strength standard. Whether the strength of car bodyshell was satisfied or not was determined by using the Finite Element Method. Later, the car bodyshell weight lightening was conducted by using an optimization algorithm, a combination of topology optimization technique and size optimization technique.
랜덤진동을 고려한 철도차량 주 변압기의 내구 특성 평가
조병진,정의철,구정서 한국생산제조학회 2018 한국생산제조학회지 Vol.27 No.6
This study conducted finite element analysis of the railway vehicle main transformer, which is a core component of railway vehicles. The purpose of this analysis is to evaluate the structural integrity and fatigue durability of the main transformer during random vibration by applying various analysis techniques. We performed static structural and fatigue analyses by applying the technical standards of railway vehicles and the detailed contents of EN 12663-1. The results of the static analysis confirmed that the maximum equivalent stresses generated in all the load cases were satisfied within the yield strength of the material. In addition KS C IEC 61373 was applied and Miner's rule was used to calculate the fatigue life. Based on the evaluation, the total damage index was 0.4381 according to Miner's rule.