This paper presents a simplified model of cracked beam by single-degree-of-freedom system. Equivalence between the and SDOF models means that they have same fundamental natural frequency similar response functions (FRFs). Similarity FRFs is checked using frequency-domain assurance criterion acknowledged herein as spectral similarity index (SSI). Finally, both its been examined versus crack loca...

Structural damage detection is a field that has attracted a great interest in the scientific community in recent years. Most of these studies use dynamic analysis data of the beams as a diagnostic tool for damage. In this paper, a massless rotational spring was used to represent the cracked sections of beams and the natural frequencies and mode shape were obtained. For calculation of rotational...

The lateral vibration of cracked isotropic thick beams is investigated. Generally, the analysis beam based on line elements can be undertaken using either Timoshenko theory or a third order (TSDT) such as Reddy theory. TSDT superior to theory, it eliminates need for shear correction coefficient. However, there no available solution which main focus this paper. investigated divided into several ...

In order to realize the accurate prediction of vibration fatigue life beam in service, a loose coupling analysis method is proposed carry out with an initial crack. modal analysis, crack segment replaced torsion spring, and damping loss factor introduced by complex modulus elasticity; for simply supported beam, inherent characteristic equation cracked derived. interaction between crack’s growth...