Accession Number : AD0479349


Title :   DEVELOPMENT OF MEASUREMENT TECHNIQUES FOR THE ANALYSIS OF TRACKED VEHICLE VIBRATION AND NOISE


Descriptive Note : Final technical rept.


Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX


Personal Author(s) : Bates, Charles L ; Sparks, Cecil R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/479349.pdf


Report Date : 30 Oct 1964


Pagination or Media Count : 141


Abstract : A comprehensive study was made of the noise and vibration characteristics of the M-113 Armored Personnel Carrier. Measurement techniques and instrumentation systems were evolved to define vibratory energy sources, transmission paths, and noise radiating sources of the vehicle. Measurement techniques were evelved for use by design personnel concerned with virtually any type of tracked vehicle. While instrumentation systems are simple and straightforward, when used with the systematic test sequence evolved, they serve to effectively evaluate noise offenders within and outside the vehicle. Results show that noise conditions within the M-113 vehicle are above the limits prescribed by most hearing damage criteria, at virtually all normal operating conditions. The track-sprocket wheel reaction and the track-idler wheel reaction were the chief sources of vibration, while predominant interior radiators vary with operating conditions. Important radiators include floor panels, engine access panels, and the variety of other thin metallic panels or components within the vehicle. Some consideration was given to treatment and redesign techniques which might be used to ameliorate existing noise conditions in the M- 113. Recommendations are given for further activity in the area of tracked vehicle noise control.


Descriptors :   *ACOUSTICS , *NOISE , *TRACKED VEHICLES , ARMORED VEHICLES , BROADBAND , DRIVE SPROCKETS , FREQUENCY ANALYZERS , FREQUENCY MODULATION , HUMAN FACTORS ENGINEERING , IDLER WHEELS , INSTRUMENTATION , MAGNETIC TAPE , MEASUREMENT , METAL PLATES , NARROWBAND , NOISE ANALYZERS , OSCILLOGRAPHS , PANELS , PASSENGER VEHICLES , PSYCHOPHYSIOLOGY , RECORDING SYSTEMS , SOUND TRANSMISSION , STRUCTURAL PROPERTIES , TANKS(COMBAT VEHICLES) , VEHICLE TRACKS , VIBRATION


Subject Categories : Surface Transportation and Equipment
      Human Factors Engineering & Man Machine System


Distribution Statement : APPROVED FOR PUBLIC RELEASE