The objective was to show that a microprocessor, when used with a ultrasonic flaw detector, can reliably regulate an ultrasonic inspection process. The project is divided into two parts; the microprocessor systems development for ultrasonic testing and analysis and joint inspection concepts for offshore structures.
The Minerals Management Service is one of eight participants in a comprehensive ice mechanics study at the U.S. Army Corps of Engineers, Cold Regions Research and Engineering Laboratory (CRREL). Shell Development is the lead participant, the others are oil companies. This is a theoretical and experimental program to determine the stress-strain relations and failure criteria for multi-year sea ice.
The objective was to study the potentially hazardous effects of Arctic (cold weather) operations on the integrity of steel weldments for Arctic structures. Fracture toughness of steel weldments are being investigated to determine requirements for verifying structural integrity.
The Naval Surface Weapons Center (NSWC) is developing parameters to provide power for the cavitation erosion cleaning technology developed in Project No. 4. These parameters are required for a diver or a free swimming submersible to carry the device untethered. Hydrogen gas is generated by reaction of lithium and water. The energy density from the lithium batteries is expected to be much greater, saving weight and space. The pressure energy can be generated without converting to an electrically driven pump.
This was a joint Industry Project (JIP). The principal investigator is serving as an agent for a joint, Office of Naval Research and U.S. Geological Survey program. The program will independently evaluate the applicability of several nondestructive examination (NDE) techniques for detecting offshore structural failures. (See Projects Nos. 23, 33, and 41).
This was a joint Industry Project (JIP). Frequency monitoring was applied to the Nondestructive Examination Method 'Round Robin' (see Project No. 34). This program evaluated the applicability of several promising methods for locating structural failures. Project No. 23 and Project No. 41 were also evaluated. Experiments were run on a 14 foot, four-legged jacket platform model at the NASA facility at Goddard.
This study performed an evaluation of the current state-of-the-art and practices for predicting pile capacity and performance. This study also examined effective stress technology for offshore pile design.
The objective was to perform an investigation of underwater acoustic imaging techniques for the inspection of structures and pipelines.
This study will investigate deepwater structures technology and evaluate the use of 'coupon' gauges for detecting fatigue failures in structures.
This was a joint Industry Project (JIP); to conduct a laboratory study of vibration response of a scale model of an offshore tower subjected to random excitation. The random decrement technique will be applied to the recorded and filtered vibration response data to establish a set of signatures. From these signatures the sensitivity of the signatures to induced fatigue cracks of various lengths and locations can be studied.
