Crack detection in pressurized pipes using Harris hawk optimization method

Sudden failure in structures is one of the results of the presence of defects in parts, which have led to many economic and human damages. Since the creation and growth of cracks can lead to component failure, many researchers have investigated methods to detect the presence of cracks in the structure. Due to the widespread use of pipes in various industries, inspection of pipes is one of the most important issues in the industry. The purpose of this research is to provide a method for crack detection (investigating crack depth and location) in pressurized pipes using modal analysis and differential quadrature method. For this purpose, first calculating the natural frequencies of the vibrations of the defective pipe, the effect of the characteristics of the crack on the vibrations of the structure is investigated, then using the Harris hawk optimization method, the location and depth of the crack is calculated using the frequencies of the cracked pipe vibrations. Examining the results obtained for cracked pipes under fluid pressure confirms the correctness and accuracy of the presented method for direct and inverse solution.