Development of Advanced Technology for Quiet Vehicles Experimental Quiet Roadarm Design

摘要

Noise produced by track-laying vehicles causes hearing loss, interferes with speech communication and provides aural detectability to the enemy. The purpose of this program is to develop noise reduction concepts and to develop the technology necessary to produce a lightweight, track-laying vehicle of the M113 family that has a sound pressure level of 100 dB(A). The earlier phases of this study rank ordered the major noise sources of the M113A1 armored Personnel Carrier, developed a preliminary mathematical model of the track and suspension, developed a high compliance prototype idler that provides over 15 dB(A) of idler dependent noise reduction, and developed an experimental compliant sprocket. Initial work was done to allow analytical prediction of changes in interior noise due to hull structure changes. The present study developed an experimental isolated roadarm assembly. The goal of 95 dB(A) for roadarm-induced noise along was closely approached. Noise-to-force transfer function measurements were made on this assembly mounted in an M113A1. (Author)