Vibratory Plate Compactors-Noise and Hand-Arm Vibrations

摘要

The proposed method for noise measurement is based on sound power levelmeasurements made in a free field over a reflecting plane. The machine is placed on an elastic support, to separate the primary sound sources on the machine from sound radiated by the compaction process. Hand arm vibrations are proposed to be measured during compaction of a test track. The test track shall be made of 'well graded sand' and about 35 cm deep. The ground under the track shall be homogeneous and free from reflections and resonances. The investigations made to prepare these proposals and their primary versions are presented in two parts. The first part contains measurements and studies of the behavior of three models of vibratory plate compacts. The two primary proposals were tested in a Round Robin test made by five laboratories in Scandinavia. The results from these tests show that the method for noise measurement can be accepted as it was proposed. The first proposed method for testing the hand-arm vibrations gave unacceptable results. The first proposed method has been changed in the specifications of the test track as well as the procedures for making the measurements and their evaluation in order to avoid the major problems that were discovered in the Round Robin test.