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한국생산제조학회 학술지 영문 홈페이지
[ Best Paper of This Month ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 1, pp.74-79
ISSN: 2508-5107 (Online)
Print publication date 15 Feb 2021
Received 29 Nov 2020 Revised 02 Dec 2020 Accepted 08 Dec 2020
DOI: https://doi.org/10.7735/ksmte.2021.30.1.74

초 임계 압력 보일러에 적용되는 압력조절밸브의 셰이크다운 탄성 한계 해석 및 규명

조락균a, *
Elastic Shakedown Analysis of Pressure-Reducing Valve of Supercritical Boiler System Under Cyclic Thermomechanical Loadings
Nak-Kyun Choa, *
aDepartment of Manufacturing Systems and Design Engineering, Seoul National University of Science and Technology (SeoulTech)

Correspondence to: *Tel.: +82-2-970-7278 E-mail address: nkcho@seoultech.ac.kr (Nak-Kyun Cho).

초록

This study presents the shakedown limit boundaries of a pressure-reducing valve (PRV) subjected to complex cyclic thermomechanical loadings using the linear matching method (LMM). The thermomechanical loadings are composed of three cyclic bending moments (in-plane, out-of-plane, and torsional), two cyclic internal pressures (high and low), and cyclic thermal loads (temperature gradients). The analysis results reveal that the PRV has a shakedown limit boundary that is identical to the plastic collapse limit. Comprehensive numerical parametric studies were also conducted to assess the effects of individual cyclic bending moments on the cyclic plastic behavior of the PRV, and the results showed that the in-plane cyclic bending moment significantly impacted the structural integrity of the PRV compared to other bending moments.

Keywords:

Cyclic plasticity, Elastic shakedown, Pressure reducing valve, The linear matching method

Acknowledgments

이 연구는 ASME 2020 International Conference on Nuclear Engineering에 발표된 연구내용[10]을 바탕으로 추가적인 파라메트릭 스터디를 수행하여 작성되었습니다. 이 연구는 서울과학기술대학교 교내연구비의 지원으로 수행되었습니다.

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Nak-Kyun Cho

Assistant Professor in the Department of Manufacturing Systems and Design Engineering, Seoul National University of Science and Technology.His research interest is non-linear structural response assessment.

E-mail: nkcho@seoultech.ac.kr