ANALYSIS OF THE MODIFICATION OF THE MODAL FREQUENCIES OF RESONANCE ACCORDING TO THE ELASTIC CHARACTERISTICS OF THE LAND AT VIBRATION COMPACTION FOR ROAD STRUCTURES

Cornelia – Florentina DOBRESCU

Abstract


This paper presents the elastic characteristics of the composite road structures composed of proportionate mixtures of clay, gravel, sand with a direct influence on the resonant frequencies for the vibratory-land roller system. Thus, for four categories of land, defined by proportionate compositions, there has been determined the rigidity on a vibration-excited trial device. In this case, there have been determined the k* dynamic stiffnesses which were subsequently converted into dynamic stiffnesses k for the compactor vibrating roller. For a four degree of freedom compaction item of equipment, in the case of the CVA10 vibrating roller, there have been established the resonant frequencies related to the functional excitation frequency of the vibrator.

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References


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