Vibration Signal Analysis by Defect Type of Heat Exchanger

Abstract

The dynamic characteristic was changed due to Young's modulus when the temperature of the heat exchanger changed. The case is often destroyed due to the heat exchanger tube, such as SCC occurs. Therefore, there is a need to predict using the FEM model. In this paper measured the vibration signal to Crack type of tubes the tube was classified attributes for each defect. And by conducting the Modal Test at the room temperature stated by using a dynamic characteristic of the hold and the predicted flow rate were compared Tube room temperature state and the dynamic characteristics of the operation state. In addition, when driving through the eigenvalue analysis, the changes in the eigenvalues component defect by types, also with respect to the heat exchanger by analyzing approached by Frequency analysis.