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논문 기본 정보

자료유형
학술저널
저자정보
류재하 (Korea National University of Transportation) 양원석 (Korea National University of Transportation)
저널정보
한국소음진동공학회 한국소음진동공학회논문집 한국소음진동공학회논문집 제32권 제6호(통권 269호)
발행연도
2022.12
수록면
552 - 559 (8page)
DOI
10.5050/KSNVE.2022.32.6.552

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초록· 키워드

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Vibration tests have been conducted to verify the structural robustness of mounted vehicle parts experiencing road excitations during driving. Given the difficulty with installing water supply devices, a numerical methodology is required to conduct environmental tests of real vehicle parts containing cooling water. In this study, the structural vibrations of an exhaust gas recirculation (EGR) system with cooling water under base excitations were analyzed considering fluid-structure interactions. A numerical model based on the finite element method (FEM) was simulated to predict the structural responses of the EGR system and pressure fluctuations of its cooling water. To describe a dynamic environmental test, the excitation condition was modeled using experimental acceleration signals. The torsional and bending modes of the cooling water receptor were revealed as important factors in determining the fatigue life. The modal frequencies of the EGR system were lowered and their mode shapes were changed owing to the added mass and fluid coupling of the cooling water. Finally, the durability life under road excitations was predicted using time analysis and Miner’s rule, and its numerical results were verified experimentally.

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ABSTRACT
1. 서론
2. 유체-구조 연성을 고려한 수치해석 모델링
3. EGR 냉각 시스템의 진동실험 및 검증
4. EGR 냉각 시스템의 내구성 평가
5. 결론
References

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