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전기 캐비닛 내부장비의 면진 전달특성 및 응답요구도 모델 평가 KCI 등재
Evaluation of Seismic Isolation Transmission Characteristics and an Acceleration Demand Model for Internal Equipment in Electrical Cabinets
- 언어KOR
- URLhttps://db.koreascholar.com/Article/Detail/453521
This study investigates the seismic isolation transmission characteristics and develops a regression-based model for predicting the acceleration demand of internal equipment mounted within electrical cabinets subjected to Uniform Hazard Spectrum (UHS)-based seismic excitations. Shake table experiments were conducted using four UHS scale factors—0.5, 1.0, 1.5, and 2.0—under both isolated and non-isolated conditions. The cabinet reference response was defined as the maximum acceleration recorded among all cabinet measurement points, while the envelope response for internal equipment locations was determined as the greater response between two monitored internal locations. Experimental results revealed that the acceleration response of internal equipment typically exceeded that of the cabinet reference, suggesting that reliance solely on cabinet measurements may underestimate the seismic demand on internal components. Although seismic isolation at the cabinet base was effective in mitigating the cabinet reference response, this attenuation was not equivalently observed in the internal equipment. The residual transmission ratio demonstrated that, even after isolation, internal equipment experienced a relatively higher acceleration compared to the cabinet reference. These findings indicate that cabinet base isolation alone is insufficient to substantially reduce the seismic response of internal equipment. Furthermore, a log-log regression analysis identified input intensity and isolation condition as significant predictors for internal equipment acceleration demand within the experimental range. The study concludes that, to ensure the protection of internal components, cabinet base isolation should be complemented by targeted local vibration reduction measures for internally mounted equipment.
1. 서 론
2. 진동대 실험 및 데이터 구성
2.1 본 연구의 분석 범위
2.2 전기 캐비닛 시편 및 내부 장착부 구성
2.3 면진테이블 및 설치 조건
2.4 UHS 입력파 및 실험 조건
2.5 가속도 응답 데이터 전처리
3. 응답 평가 지표 및 응답요구도 모델
3.1 Peak 및 RMS 응답 산정
3.2 캐비닛 기준 응답
3.3 내부장비 envelope 응답 및 가속도 증폭계수
3.4 면진 전달계수 및 보호성능 손실 지표
3.5 입력강도 기반 내부장비 응답 요구도 모델
4. 결과 및 분석
4.1 입력강도별 가속도 응답
4.2 내부장비 envelope 응답 및 증폭 특성
4.3 내부장비 보호성능 손실 및 잔류전달 특성
4.4 입력강도 기반 내부장비 응답요구도 모델
5. 고 찰
6. 결 론
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