한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2008년도 춘계학술대회논문집
- /
- Pages.484-490
- /
- 2008
- /
- 1598-2548(pISSN)
HHT와 연속스캐닝 진동계를 이용한 임펄스가진된 구조물의 모드 형상 복원
Mode Shape Reconstruction of an impulse excited structure using HHT and CSLDV
- Kyong, Yong-Soo ;
- Kim, Dae-Sung ;
- Dayou, Jedol (Universiti Malaysia Sabah) ;
- Park, Kyi-Hwan ;
- Wang, Se-Myung
- 발행 : 2008.04.17
초록
For CSLDV, the Chebyshev demodulation (or polynomial) technique and Hilbert transform approach have been used for mode shape reconstruction with harmonic excitation. In this paper, the Hilbert-Huang transform approach was applied as an alternative to impact excitation cases in terms of a numerical approach. The vibration of the tested structure is modeled using impulse response functions. In order to verify this technique, a simply supported beam was chosen as the test rig. With additional innovative steps which are the ideal-band pass filter and the nodal point determination, Hilbert-Huang transformation can be used for a good mode shape reconstruction even in the impact excitation case.