NDE (Non-Destructive Evaluation) Round Robin. The Evaluation of NDE Techniques for Determining Offshore Structures Integrity Appendices

摘要

The Round Robin Test Program was undertaken to document the abilities of several nondestructive evaluation (NDE) techniques in monitoring the integrity of large, complex structures and, particularly, off-shore oil platforms. The test program required advocates of various techniques to diagnose damages done to a scale model offshore oil platform. These diagnoses were based on data acquired by an independent test facility which carried out the specific instructions of the advocates in applying the technique. Of the three NDE methods which completed the testing, the Random Decrement Technique and the Frequency Response Technique both showed the ability to determine whether or not structural damage had occurred and to estimate the severity of that damage. Beyond that, the Frequency Response Method performed best in locating the damage, and the Random Decrement Method showed more confidence in identifying low levels of damage. In a separate test sequence, the Ultrasonic Technique demonstrated the ability to predict impending catastrophic failure in a scale model welded steel K-joint.