Abstract
Different methods to identification of linear and nonlinear damping in lightly damped structures are discussed in this paper. The discussion is based on experiments with a 4 meter high monopile. Two alternative methods have been used for experimental cases of linear and nonlinear damping. Method 1 is identification by ARMA models assuming a white noise input.Method 2 is identification by simulation of a free decay response. Experimental data on the free decay response has been obtained directly by measurement as well as by the random decrement technique. Two experimental cases has been considered. the first case was a naturally damped monopile which was considered to be linear viscous damped. The second case was nonlinear viscous damping of the monopile due to a mounted damper on the monopile. The two cases illustrates identification of lightly damping in the linear and nonlinear case.
| Original language | English |
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| Title of host publication | Proceedings of the 8th International Modal Analysis Conference : January 29 - February 1, 1990, Hyatt Orlando Kissimmee, Florida |
| Number of pages | 7 |
| Publisher | Society for Experimental Mechanics |
| Publication date | 1990 |
| Pages | 1041-1047 |
| ISBN (Print) | 0912053852 |
| Publication status | Published - 1990 |
| Event | The International Modal Analysis Conference - Hyatt Orlando Kissimmee, Florida, United States Duration: 29 Jan 1990 → 1 Feb 1990 Conference number: 8 |
Conference
| Conference | The International Modal Analysis Conference |
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| Number | 8 |
| Country/Territory | United States |
| City | Hyatt Orlando Kissimmee, Florida |
| Period | 29/01/1990 → 01/02/1990 |
| Series | International Modal Analysis Conference. Proceedings (Print) |
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| ISSN | 1046-6770 |
Keywords
- Damping
- Monopile
- ARMA Models