Análise dinâmica de base de britadores cônicos

Abstract

The present study fits into the context of dynamic calculations applied to structural engineering. Sometimes the dynamic behavior of structures is ignored, or approximated incoherently through an assumed equivalent static analysis. Therefore, it is highlighted the importance of understanding dynamic forces and responses in structures for their correct design, life span and safety. The objective of this work is to evaluate the behavior of the base-raft foundation assembly in face of the dynamic forces arising from the operation of cone crushers. Verify the normative dimensioning of the reinforced concrete components of the crusher base, as well as the consequences of vibration levels for equipment life and human response (physiological criterion). The activities were developed from an in-depth case study of a structure of a mining plant in the state of Minas Gerais - Brazil. The results indicated that the dynamic excitation caused by the regime operation of the conical crusher in phase results in the critical condition for the structure, but at levels lower than those stipulated by the reference standards. From the analyzes performed it can be verified that, for the evaluated condition the calculated, velocity and acceleration values are below the limits recommended by the adopted standards, being the structure approved for the verified criteria, namely: structural dynamic, equipment and physiological.