Projects / Programmes
Mechanics of structures and ground
January 1, 1999
- December 31, 2003
| Code |
Science |
Field |
Subfield |
| 2.05.00 |
Engineering sciences and technologies |
Mechanics |
|
| 2.01.00 |
Engineering sciences and technologies |
Civil engineering |
|
| Code |
Science |
Field |
| T002 |
Technological sciences |
Construction technology |
| P002 |
Natural sciences and mathematics |
Physics |
| P001 |
Natural sciences and mathematics |
Mathematics |
Researchers (12)
Organisations (1)
Abstract
The research program considers the problem of identification of continuos and discrete systems by the usage of their dynamic response. The eigenfrequencies spectrum and the corresponding eigenvectors are used with discrete systems, while for continuous systems the ratio between the speed of waving and the frequency is required. Although the basic ideas of dynamical identification of systems, also know as inverse identification in mechanics, have been known for a long period, the recent and intensive development of microelectronics in last decade has finally allowed also practical application in engineering practice. It became evident that some basic questions have to be researched again and new computational models based on new theoretical discoveries have to be redevelop. With the discrete systems and the system that can be discretisied with high accuracy the question between the computational model and the minimal quantity of data required for reliable identification of the structure remains open. It must be considered that despite the tremendous progress of microelectronic a single measurements point remains very expensive and therefore the question about the minimal but yet sufficient amount of the data remains actual not only from scientific point of view, but also from practical aspects. Our work is therefore oriented towards the improvements of computational model that should allow as much as possible stabile identification with minimal data required. The basic problem will be expanded to the identification of changes that might appear in the system.
At the continuos systems, where the discretisation can be problematic, the problem requires different approach. Due to the complexity of the problem the studies will be limited to a selected configuration very important from the dynamic interaction view - the ground. This group of structures is represented by the system where one or two geometrical dimensions approach infinity, i.e. systems that have a shape of the half space. The basic question about the ration between the computational model and minimal required number of measurements point is also repeated here again. Among computational models available the attention will be devoted to the direct identification of spatial Green's function, the approach first introduced by our research group. The work will be simultaneously oriented also towards the development of computational model and measurements methods. Another possible approach is the application of equivalent discrete model. A part of our attention will also be oriented towards this solution. The problem that arises is the question of radiation boundary conditions, which represent the problem, widely studied in the existing references however without all possible acceptable solutions.
Most important scientific results
Final report
Most important socioeconomically and culturally relevant results
Final report
