6.16: Nomenclature
- Page ID
- 34787
a_{1},a_{2} |
Weight factors k-value (permeability) |
- |
A |
Surface |
m^{2} |
b_{pr} |
Projected width of the blade perpendicular to the velocity direction |
m |
c_{i} ,c_{1} ,c_{2} |
Coefficients (non-cavitating cutting process) |
- |
c_{r} |
Coefficient side effects |
- |
c_{s} |
Wear coefficient |
- |
c_{t} |
Coefficient total cutting force (non-cavitating cutting process) |
- |
c_{ts} |
Coefficient total cutting force including wear effects |
- |
c_{tr} |
Coefficient total cutting force including side effects |
- |
d_{i} ,d_{1} ,d_{2} |
Coefficients (cavitating cutting process) |
- |
d_{r} |
Coefficient side effects |
- |
d_{s} |
Wear coefficient |
- |
d_{t} |
Coefficient total cutting force (cavitating cutting process) |
- |
d_{ts} |
Coefficient total cutting force including wear |
- |
d_{tr} |
Coefficient total cutting force including side effects |
- |
E_{sp} |
Specific cutting energy |
kN/m^{2} |
E_{gc} |
Specific cutting energy (no cavitation) |
kN/m^{2} |
E_{ca} |
Specific cutting energy (full cavitation) |
kN/m^{2} |
F_{ci} |
Cutting force (general) |
kN |
F_{cit} |
Total cutting force (general) |
kN |
F_{h} |
Horizontal cutting force (parallel to the cutting speed) |
kN |
F_{l} |
Cutting force parallel to the edge of the blade |
kN |
F_{n} |
Normal force |
kN |
F_{v} |
Vertical cutting force (perpendicular to the cutting velocity) |
kN |
F_{w} |
Friction force |
kN |
F_{x} |
Cutting force in x-direction (longitudinal) |
kN |
F_{xt} |
Total cutting force in x-direction (longitudinal) |
kN |
F_{y} |
Cutting force in y-direction (transversal) |
kN |
F_{yt} |
Total cutting force in y-direction (transversal) |
kN |
F_{z} |
Cutting force in z-direction (vertical) |
kN |
g |
Gravitational acceleration |
m/s^{2} |
h_{i} |
Initial layer thickness |
m |
h_{b} |
Blade height |
m |
k |
Permeability |
m/s |
k_{i} |
Initial permeability |
m/s |
k_{max} |
Maximum permeability |
m/s |
k_{m} |
Effective permeability |
m/s |
K_{1} |
Grain force on the shear zone |
kN |
K_{2} |
Grain force on the blade |
kN |
l |
Length of the shear zone |
m |
n |
Normal on an edge |
m |
n |
Porosity |
- |
n_{i} |
Initial pore percentage |
% |
n_{max} |
Maximum pore percentage |
% |
N_{1} |
Normal force on the shear zone |
kN |
N_{2} |
Normal force on the blade |
kN |
p |
Number of blades excavating element |
- |
p |
Pressure (water pressure) |
kPa |
p_{atm} |
Atmospheric pressure |
kPa |
P_{calc} |
Calculated dimensionless pressure (water pore pressure) |
- |
p_{damp} |
Saturated water pore pressure (12 cm.w.c.) |
kPa |
P_{real} |
Real pore pressure (water pore pressure) |
kPa |
p_{1m} |
Average pore pressure in the shear zone |
- |
p_{2m} |
Average pore pressure on the blade |
- |
P_{c} |
Drive power excavating element |
kW |
q, q_{1} ,q_{2} |
Specific flow |
m/s |
Q |
Flow per unit of blade width |
m^{2}/s |
s |
Length of a stream line |
m |
s |
Measure for the layer thickness |
m |
S_{1} |
Shear force on the shear zone |
kN |
S_{2} |
Shear force on the blade |
kN |
v_{c} |
Cutting velocity perpendicular to the edge of the blade |
m/s |
V |
Volume strain per unit of blade width |
m^{2} |
w |
Width of blade of blade element |
m |
W_{1} |
Pore pressure force on the shear zone |
kN |
W_{2} |
Pore pressure force on the blade |
kN |
x |
Coordinate |
m |
y |
Coordinate |
m |
z |
Coordinate |
m |
z |
Water depth |
m |
α |
Blade angle |
rad |
β |
Shear angle |
rad |
ε |
Volume strain |
- |
φ |
Angle of internal friction |
rad |
δ |
Soil/steel interface friction angle |
rad |
ρ_{g} |
Wet density of the sand |
ton/m^{3} |
ρ_{s} |
Dry density of the sand |
ton/m^{3} |
ρ_{w} |
Density of water |
ton/m^{3} |
θ_{r} |
Angular displacement force vector as a result of side effects |
rad |
θ_{s} |
Angular displacement force vector as a result of wear |
rad |
θ_{t} |
Angle force vector angle in relation to cutting velocity vector |
rad |
θ_{ts} |
Angle force vector angle in relation to velocity vector including wear |
rad |
θ_{tr} |
Angle force vector angle in relation to velocity vector including side effects |
rad |
Θ_{r} |
Angular displacement force vector as a result of side effects |
rad |
Θ_{s} |
Angular displacement force vector as a result of wear |
rad |
Θ_{t} |
Angle force vector angle in relation to cutting velocity vector |
rad |
Θ_{ts} |
Angle force vector angle in relation to velocity vector including wear |
rad |
Θ_{tr} |
Angle force vector angle in relation to velocity vector including side effects |
rad |