Every data in Tdyn must be defined with units. Most of the units can be inserted in a menu next to the entry field, but some of them should be inserted in the Tdyn Units Data window.
Every unit field in Tdyn includes several standard units definition, but user can enter additional units based on the basic units definition shown in the next table.
Unit |
Dimension |
Conversión factor to IS |
Description |
% |
Undimensional |
0.01 |
per-one-hundred |
%o |
Undimensional |
0.001 |
per-one-thousand |
pi |
Undimensional |
3.14159265 |
pi |
e |
Undimensional |
2.71828183 |
ln-base |
ppmC |
Undimensional |
1.00E-06 |
parts-per-million of phi |
ppbC |
Undimensional |
1.00E-09 |
parts-per-billion of phi |
U |
Undimensional |
1 |
phi units (user defined) |
C |
Undimensional |
1 |
spc units (user defined) |
m |
Length |
1 |
meter |
A |
Length |
1.00E-10 |
angstrom |
in |
Length |
0.0254 |
inch |
pica |
Length |
0.00423333 |
pica=1/6[in] |
ft |
Length |
0.3048 |
feet=12[in] |
yd |
Length |
0.9144 |
yard=3[ft] |
mi |
Length |
1609.344 |
mile=5280[ft] |
leg |
Length |
4828.032 |
league=3[mi] |
Nmi |
Length |
1852 |
nautic-mile |
au |
Length |
1.50E+11 |
astronomic-unit |
s |
Time |
1 |
second |
min |
Time |
60 |
minute |
hour |
Time |
3600 |
hour=60[min] |
day |
Time |
86400 |
day=24[hour] |
week |
Time |
604800 |
week=7[day] |
month |
Time |
2629743.83 |
month=1/12[year] |
year |
Time |
31556926 |
year=365.24219879[day] |
Kg |
Mass |
1 |
Kilogram |
g |
Mass |
0.001 |
gram |
qui |
Mass |
100 |
quintal |
lb |
Mass |
0.45359237 |
libra |
ton |
Mass |
907.18474 |
tonne=2000[lb] |
oz |
Mass |
0.02834952 |
ounce=1/16[lb] |
amu |
Mass |
1.66E-27 |
atomic-mass-unit |
rad |
Angle |
1 |
radian |
deg |
Angle |
0.01745329 |
degre=1/180[pi.rad] |
grad |
Angle |
0.01570796 |
grade=0.9[deg] |
turn |
Angle |
6.28318531 |
turn=[2.pi.rad] |
Gt |
Temperature |
1 |
Grade-thermical |
ha |
Area |
10000 |
hectare |
acre |
Area |
4046.85642 |
acre=4840[yd2] |
barn |
Area |
1.00E-28 |
barn |
are |
Area |
100 |
are |
lt |
Volume |
0.001 |
liter |
gal |
Volume |
0.00378541 |
gallon=231[in3] |
brgal |
Volume |
0.0045461 |
britgallon=277.42[in3] |
imp |
Volume |
1.20095 |
imperial |
pt |
Volume |
0.00189271 |
pinta=0.5[gal] |
qt |
Volume |
0.00094635 |
quart=0.25[gal] |
cc |
Volume |
1.00E-06 |
cubic-centimeter |
knot |
Velocity |
0.51444444 |
knot=[Nmi/hour] |
nudo |
Velocity |
0.51444444 |
nudo=knot |
mach |
Velocity |
331.46 |
sound-speed |
c |
Velocity |
3.00E+08 |
light-speed |
G |
Acceleration |
9.80665 |
earth-gravity |
N |
Force |
1 |
=[Kg.m/s2] |
dn |
Force |
1.00E-05 |
dyne=[g.cm/s2] |
Kp |
Force |
9.80665 |
Kilopondio=[Kg.G] |
lbf |
Force |
4.448222 |
libra-fz=[lb.G] |
tonf |
Force |
8896.44323 |
tonne-fz=[ton.G] |
Pa |
Tension |
1 |
Pascal=[N/m2] |
mmHg |
Tension |
133.322 |
mm-of-Hg |
atm |
Tension |
101325 |
Atmosphere |
bar |
Tension |
1.00E+05 |
bar=750.0638[mmHg] |
psi |
Tension |
6894.75789 |
psi=[lbf/in2] |
J |
Energy |
1 |
Joule=[N.m] |
erg |
Energy |
1.00E-07 |
ergio=[dn.cm] |
cal |
Energy |
4.1868 |
caloria |
btu |
Energy |
1055.06 |
British-thermal-Unit |
W |
Potency |
1 |
Watt=[N.m/s] |
hp |
Potency |
745.6999 |
Horsepower |
hz |
Frequency |
1 |
[1/s] |
ppm |
Density |
1.00E-06 |
parts-per-million=[g/l] |
ppb |
Density |
1.00E-09 |
parts-per-billion=[mg/l] |
St |
Kinematic Viscosity |
1.00E-04 |
Stokes |
P |
Viscosity |
1.00E-01 |
Poise |
Examples:
W.m (watts per meter), N/m2 (newtons per square meter), m3 (cubic meter), g/cc (grams per cubic centimeter).
New units can also be created by adding standard modifiers to the basic unit. These modifiers are shown next:
Value |
Name |
|
a |
10-18 |
ato |
f |
10-15 |
femto |
p |
10-12 |
pico |
n |
10-9 |
nano |
u |
10-6 |
micro |
m |
0.001 |
mili |
c |
0.01 |
centi |
d |
0.1 |
deci |
D |
10 |
Deca |
H |
100 |
Hecto |
K |
1000 |
Kilo |
M |
106 |
Mega |
G |
109 |
Giga |
T |
1012 |
Tera |
E |
1015 |
Hexa |
P |
1018 |
Peta |
Examples:
Dm (Decameter), mlt (mililiter), mm2 (square milimeter), cm/s (centimeters per second).