Damping identification of structure using free vibration data | |
| Author | Bui Thanh Tam |
| Call Number | AIT Thesis no.ST-91-01 |
| Subject(s) | Structural dynamics--Statistical methods Damping (Mechanics) Structural dynamics--Statistical methods Damping (Mechanics) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-91-01 |
| Abstract | Quantification of damping is by far the most vexing problem in dynamics of structures, because damping does not refer to a unique physical phenomenon. The ability to estimate damping ratios accurately plays an important role in the design of dynamically sensitive structures. A modern method of system identification, the Ibrahim Time Domain method, is applied to estimate the modal characters of structure. The effect of the white noise on the accuracy of identifying natural frequency and damping ratio is investigate through numerical examples : Single degree of freedom system, three degree of freedom system, and structure with a tuned mass damper (TMD). The results confirm that the accuracy of the solution depends on the number and characteristics of data series, on the number of data points, on the sampling period, on the closeness of natural frequencies, and on the magnitude of damping. The study also shows the advantages of the method over the logarithmic decrement method. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-91-01 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Yamaguchi, Hiroki;Yamaguchi, Hiroki; |
| Examination Committee(s) | Karasudhi, Pisidhi ;Maekawa, Koichi; |
| Scholarship Donor(s) | Government of Australia; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1991 |