Design Optimization and Performance Analysis of the Pneumatic DTH Hammer with Self-Propelled Round Bit

Table 2

Comparison of results between measurement and simulation.

	Displacement (mm)	Impact velocity (m/s)	Frequency (Hz)	Impact energy (J)
Measurement	60	5.8	24	67.3
Simulation	62	6.2	28	76.1
Error (%)	3.33	6.89	7.69	13.07