일체형 고무 형상 설계를 통한 준영강성 진동 절연기 연구
Development of a Quasi-Zero Stiffness Vibration Isolator with an Integrated Rubber Structure
- 주제(키워드) Quasi-Zero Stiffness , Vibration Isolation , Transmissibility , Finite Element Method
- 발행기관 서강대학교 일반대학원
- 지도교수 이승엽
- 발행년도 2026
- 학위수여년월 2026. 2
- 학위명 석사
- 학과 및 전공 일반대학원 기계공학과
- 실제URI http://www.dcollection.net/handler/sogang/000000082376
- UCI I804:11029-000000082376
- 본문언어 한국어
- 저작권 논문은 저작권에 의해 보호받습니다.
초록(요약문)
Ultra-low frequency vibrations adversely affect equipment lifespan, and vibrations transmitted externally induce noise. However, conventional vibration isolation technologies based on passive and active systems have failed to overcome limitations related to frequency response characteristics and cost, hindering their widespread application across general industries. Recently, research utilizing Quasi-Zero Stiffness (QZS) metastructures for vibration isolation has been actively conducted. This approach enables effective vibration isolation at a low cost and allows for the isolation of vibrations in the ultra-low frequency range, which is difficult to address effectively with conventional passive vibration control methods. In this study, we propose a QZS insulator designed for mass production using natural rubber via molding and performed optimal design to satisfy the target load using the Finite Element Method (FEM). Through parameter analysis, the sensitivity of geometric parameters with respect to the output parameters was derived. The QZS conical grommet designed in this paper achieved superior vibration isolation performance in the ultra-low frequency range. By realizing a significant reduction in resonance frequency to 6 Hz and a 37% decrease in peak vibration transmissibility under the planned preload, the validity of the QZS structure for improving actual vibration isolation performance was experimentally verified.
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List of Contents
1. 서론 1
1.1. 연구 배경 1
1.2. 연구 동향 4
1.3. 연구 목표 6
2. 이론적 배경 7
2.1. 기저가진(base excitation) 시스템 7
2.2. 준영강성 메커니즘 10
3. 연구방법 12
3.1. 분산분석(ANOVA) 12
3.2. 충격 시험(Impact Hammer Test) 15
3.3. 준영강성 절연체의 설계 17
3.4. 준영강성 절연체 모델링(FEM) 19
4. 실험 결과 및 분석 25
4.1. 매개변수 분석 및 최적화 25
4.2. 정적 특성 분석 29
4.3. 동적 특성 분석 31
4.4. 고하중 최적화 모델 연구 38
5. 결론 43
6. Reference 45
Appendix
