FIELD: investigating or analyzing materials.
SUBSTANCE: method comprises generating pulses of free flexible vibrations in the part of the pipeline to be tested and changing loading subsequently in all local zones of the part. Two measurements of the flexible vibration frequency are performed for each local zone for various acoustic loadings in the immediate vicinity of the local zone. The presence of defects and their location can be judged from the presence and location of zones characterized by the step variations of the results of the first and second measurements.
EFFECT: expanded functional capability and sensitivity of the method.
1 dwg
