Slide 2 Energy Considerations If we take PDA measurements. Slide
3 Energy Concepts Potential EnergyPotential Energy Rated
EnergyRated Energy Kinetic Energy (Hammer Efficiency)Kinetic Energy
(Hammer Efficiency) Transferred Energy (ENTHRU)Transferred Energy
(ENTHRU) Slide 4 we can calculate the Transferred Energy WRWRWRWR h
E R = W R h Manufacturers Rating WRWRWRWR Max E T = F(t) v(t) dt
(ENTHRU) T = ENTHRU/ E R (transfer ratio or efficiency) Measure
Force, F(t) Velocity, v(t) Slide 5 Statistical Summaries
Transferred energy ratios at End of Driving Slide 6 Statistical
Summaries Transferred energy ratios at End of Driving Slide 7
Statistical Summaries Transferred energy ratios at End of Driving
Slide 8 Statistical Summaries Transferred energy ratios at End of
Driving Slide 9 Energy Three types of energy: Potential or rated
energy (mgh) Friction inside hammer Inclination Kinetic or impact
energy (mv 2 /2) Hammer cushion Helmet Pile cushion Transferred
energy or ENTHRU (PDA) Pile length Resistance
