Dynamic Analysis of Cracked Tubes Filled with Liquid

Abstract

Cracks in a vibrating structural component reduce safety and can cause catastrophic failure. The discontinuities like cracks and notches change the dynamic behaviour of structure. The change in vibration parameters depends upon location and severity of the damage. Thus it is very important to study the e ect of crack on vibration behavior of structure to achieve structural safety and performance. Non-destructive techniques are used to detect, locate and quantify the damages in structures. As this method is very costly and time consuming, the detection of damage by using change in vibration parameters may prove a better way in structural health monitoring. Dynamic analysis of uncracked and cracked tube lled with liquid at pressure has been studied. The various crack detection algorithms and method to investigate crack location based on the natural frequencies are studied. Natural frequency based mode shape method is used for nding out the crack in tube lled with liquid at pressure. Crack detection is performed by analytical and experimental method for cantilever supported transverse and inclined cracked tube Filled with liquid at pressure. This method gives accurate results between the actual crack location and predicted crack location.