Damage localization of beams based on measured forced responses
| Autor: | Stanislav Stoykov, Emil Manoach |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Timoshenko beam theory
0209 industrial biotechnology Computer science Oscillation Quantitative Biology::Tissues and Organs Mechanical Engineering Acoustics Shear force Aerospace Engineering Stiffness 02 engineering and technology Classification of discontinuities Curvature 01 natural sciences Computer Science Applications Discontinuity (linguistics) 020901 industrial engineering & automation Control and Systems Engineering 0103 physical sciences Signal Processing medicine medicine.symptom 010301 acoustics Beam (structure) Civil and Structural Engineering |
| Zdroj: | Mechanical Systems and Signal Processing. 151:107379 |
| ISSN: | 0888-3270 |
| Popis: | The early detection and localization of damages is essential for optimal operation and efficient maintenance of structures. The methods for damage detection and localization should be able to work for wide range of frequencies since the frequency of oscillation cannot be controlled in majority of real-life applications. The current work presents two new approaches for damage localization of beams. The approaches are based on comparison of time responses of intact and damaged beams. The first approach is called selective index method and considers the curvature of the beam and its time derivatives. The second approach considers the fact that the damage of the beam introduces discontinuity of the shear force and uses these discontinuities to localize the damage. Two types of damages are considered - damage modeled by reduced thickness and by reduced stiffness. Several examples are presented and it is demonstrated that both approaches localize correctly the damage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect