DEVELOPMENT OF A LOW FREQUENCY ULTRASONIC INSPECTION SYSTEM FOR THE M-149 WATER TANK,

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Abstract:

The purpose of the program was to determine the feasibility of low frequency ultrasonic techniques for detecting voids and debonds in the M-149 water tank. The major objectives of the program were to 1 determine the capability of existing equipment, 2 investigate all low frequency techniques, through-transmission, pulse-echo, and pitch-catch to determine the best method, and 4 demonstrate it on a test tank. An evaluation of commercially available equipment showed that it was necessary to design and build a high power low frequency ultrasonic generator to investigate one sided methods, namely pulse-echo and pitch-catch. Extensive testing with pulse-echo and pitch-catch showed both methods to be unfeasible for this application. One technique for eliminating the inside operator was considered theoretically, but couldnt be tried experimentally because of a shortage of funds. This technique would make use of an omnidirectional transducer on the inside of a water filled M-149 tank. Investigation of this technique is recommended as a future course of action when the necessary funds are available or action warrants. Author

Author(s):
Kubiak, E. J.
Author Organization(s):
GENERAL AMERICAN TRANSPORTATION CORP NILES ILL GENERAL AMERICAN RESEARCH DIV
Pagination:
0061

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
DAAE07-67-C-3614
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*WATER TANKS, *NONDESTRUCTIVE TESTING, *ULTRASONIC PROPERTIES, NONDESTRUCTIVE TESTING, TANKS(CONTAINERS), TEST METHODS, TEST EQUIPMENT, FEASIBILITY STUDIES, MANUFACTURING, QUALITY CONTROL, ACCEPTABILITY, RELIABILITY, LOW FREQUENCY, ULTRASONIC RADIATION, SOUND TRANSMISSION, PULSES, ACOUSTIC SIGNALS, ATTENUATION, SOUND GENERATORS, MATHEMATICAL MODELS, DEFECTS(MATERIALS), ELECTROACOUSTIC TRANSDUCERS, THERMAL INSULATION, BONDING, EXPANDED PLASTICS, POLYESTER PLASTICS, GLASS TEXTILES, EPOXY RESINS, COATINGS
Field(s)/Group(s):
Containers and Packaging, Test Facilities, Equipment and Methods
Report Date:
1967 Dec 01