Rincent ND Technologies
Minidyn User Manual
Page 20
2.2.3
Method comparison
Parameter
Method Max
Method Integral
Ground modeling
Static
Spring only
Dynamic
Spring, weight, damping
Quality index
No
Yes
Measurement bias
Around 10%
Non biased
Processing time
Fast
Slow
Algorithm rugness
Very high
Work every time
Need a good quality measurement
Since the Mas method incorporate in the stiffness calculated the dynamic behavior of the
ground, the resulting stiffness is lower that the stiffness calculated using Integral method.
Bias form 10% to 20% is observed and have to be taken into account during the correlation.
2.3
Boussinesq formulae
Minidyn software use the Boussinesq equation to calculate the ground ELWD modulus.
2 1 −
Where:
-
ν
is the Poisson coefficient of the ground material.
-
η
is the plate form factor.
-
r
is the radius of the plate
-
k
is the stiffness of the ground.
All this parameter, except K that is previously calculated, are modifiable in the Minidyn
software in the configuration panels.
Summary of Contents for Minidyn V9
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