Journal of Theoretical
and Applied Mechanics

56, 1, pp. 169-178, Warsaw 2018
DOI: 10.15632/jtam-pl.56.1.169

Determination of the internal resistance of a hammer drill chisel

Nikolay Nikolov, Petko Sinapov
The present work examines damped oscillations of a chisel, represented as a distributed
parameters system. The system is discretized with the finite element method. Rayleigh’s
law is used for the modelling of the resistance. The internal resistance of the mechanical
system has been determined by an experiment, then enshrined in the numerical model.
Comparison and analysis of the results have been made.
Keywords: free damped oscillations, FEM, Rayleigh damping matrix, damping coefficients