Mike's Deck Flashcards
Stress has how many components?
And what type are they / how many of each are there?
9 components
3 Normal
6 Shear
In 3D shear Strain, how many components does the top surface has?
Two
what is the symmetry in the stress and strain mapped to?
To the Stiffness Tensor
VIA Symmetry reduces 81 variables to how many?
21
under standard practice, reduce the 9 components into how many unique components?
6
6x6 gives a _____ _____ (matrix) of 36
a stiffness tensor
The matrix for isotropic media has how many parameters and what are they?
two.
Lamda
Mew
How independent parameters are there in a transverse isotropic media
5
what is poisson’s ratio numbers for cork and rubber?
Cork = 0.0 Rubber = 0.5
what six parameters contribute to the derivation of the wave equation?
longitudinal element length movement extension strain stress Hook's Law
What are the big two that lead to the wave equation?
Hooks Law and Newton’s second law
frequency = ?
1 / T (tao) where T is period
slide 14 / 51 from L5
what does the convolution integral compute?
One output sample
**End of Review **
End of Review
what will an event in a medium usually create?
Wavelet
what do repeated events create?
Repeated wavelets
What’s special about the wavelet that an earthquake creates?
the wavelet will propagate in different modes
How can a wavelet become a seismic trace??
by taking different paths
What are the three different paths that a wavelet can take when they become a seismic trace?
Through the Earth
from different reflecting surfaces
from additional excitations
what are the two assumptions made with wavelets?
Superposition and Addition
What is the superposition assumption?
the content of one wavelet does no interfere with another wavelet; they pass each other