Pile, hammer, PDA, and environmental parameters
Use the parameters below for the Project Part 3 analysis. Per the project requirements, users should be able to adjust these parameters, if desired from within the notebook. Do not overwrite the parameters in the support code files.
Pile parameters
| \(L\) |
Total pile length |
150 feet |
| \(A\) |
Pile cross-sectional area |
477 square inches |
| \(b\) |
Pile perimeter |
56 inches |
| \(E\) |
Pile modulus |
6,807,000 psi |
| \(c\) |
Pile wave speed |
14450 feet/second |
| \(\rho\) |
Pile mass density |
2403 kg/m^3 |
| \(\nu\) |
Poisson’s ratio |
0.2 |
Hammer parameters
| \(W\) |
Hammer ram weight |
20,000 pounds |
| \(a\) |
\(S_o\) equation efficiency |
0.4 |
| \(h_{0}\) |
piston height at the start of Phase 1 |
varies |
| \(m_{piston}\) |
piston mass |
9072 kg |
| \(A_{piston}\) |
piston cross-sectional area |
0.75 m |
| \(V_{min}\) |
minimum volume of the combustion chamber when piston height is zero |
7.5e-4 m^3 |
| \(h_{exhaust}\) |
exhaust port height |
0.5 m |
| \(V_{fuel}\) |
volume of fuel injected per cycle |
varies |
| \(\rho_{fuel}\) |
fuel density |
832 kg/m^3 |
| \(Q_{fuel}\) |
specific energy content of fuel |
44 MJ/kg |
| \(\eta_{combustion}\) |
combustion efficiency |
0.4 |
| \(T_{ignition}\) |
ignition temperature |
500 K |
| \(T_{ambient}\) |
ambient temperature |
300 K |
| \(P_{atm}\) |
ambient temperature |
101 kPa |
| \(g\) |
gravitational acceleration |
9.81 m/s/s or 32.2 ft/s/s |
PDA parameters
| \(L_{pda}\) |
Distance from PDA instruments to pile toe |
128.8 feet |
| \(J\) |
Case method soil damping |
0.5 |
| \(d_{2813}\) |
Pile tip depth at blow 2813 |
113 feet |
| \(d_{3701}\) |
Pile tip depth at blow 3701 |
132 feet |
| \(t_{imp,2813}\) |
Time of start of blow impact for blow 2813 |
29.4 milliseconds |
| \(t_{imp,3701}\) |
Time of start of blow impact for blow 3701 |
29.0 milliseconds |
Environmental parameters
| \(c_{air}\) |
Speed of sound in air |
1125 feet/second |
| \(c_{water}\) |
Speed of sound in water |
4920 feet/second |
| \(\rho_{air}\) |
Density of air |
1.225 kg/m^3 |
| \(\rho_{water}\) |
Density of water |
1025 kg/m^3 |
| \(p_{ref,air}\) |
Acoustic reference pressure for air |
20 \(\mu\)Pa |
| \(p_{ref,water}\) |
Acoustic reference pressure for water |
1 \(\mu\)Pa |