EXPERIMENTAL STUDIES OF NOISE AND VIBRATION IN HYDROELECTROPULSE PRESS WORKING AREA

Abstract

The experiments supporting theoretical conclusions on the process regularities of the vibration excitation and noise generation are considered. As part of the study, part blanks, such as thin plates and of a complex profile, were machined on the presses of T 1228 and T 1225 Models. Thus, sound levels (dBA), as well as noise pressure and vibration speed levels in octave and 1/3-octave frequency intervals were specified. Experimental data were recorded by the multifunctional acoustic meter “Ekofizika”. Noise measurements were performed by the preamplifier and microphone capsule, and vibration measurements — by the three-component accelerometer. The most intense components of the spectrum are recorded in the low and mid-range frequencies (31.5—500 Hz). At higher frequencies, the sound radiation intensity is falling off — 3—5 dBA per octave.