Consideration Regarding the Dynamic Mechanical System Identification

Abstract

In the continuous effort to improve knowledge on the dynamic behavior of a building, the trend is towards the study of a building’s behavior having as starting point the tests carried out on site. Tests on site are the current trend in studying buildings behavior. This approach provides the means to:
- Verify structure’s quality;
- Verify its security level in real operational conditions;
- Validate existing analytical models of behavior;
- Verify assumptions made on a priori to predict structures response;
- Gain knowledge to improve sizing methods;
- Developing new models of behavior.
The accuracy of modal parameters - frequency and eigenform of vibration own - depend on the precision, which can be measured by the frequency response function (FRF), hence the critical importance of how the excitement of the structure to vibration amplitudes maintain as close to the operating level in all areas of interest have.
Developed techniques for identifying the frequencies and forms its own specific structures using a single excitation, excitation concurrent multi-point excitation in several consecutive points. These methods involve performing iterative process leading to the possibility of automation.