Numerical Simulation and Optimum Design of Piston in GQ89 DTH Hammer

Abstract:

Piston is a moving part of DTH hammer, which produces impact force to realize impacting breaking rock with complicated stress. Firstly, finite element analysis on the old piston that had been broken in the experiment was made with the ANSYS/LS-DYNA program to find out the cause leading to piston’s destruction; then new piston was optimum designed based on the analysis on stress and strain with finite element software.