Numerical Modeling of Dynamic 3D Processes
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1 Numerical Modeling of Dynamic 3D Processes Corresponding member of RAS, Professor, Head of Computer Science and Computational Mathematics Department Igor B. Petrov Moscow Institute of Physics and Techology,
2 Contents Numerical modeling of Arctic problems Numerical simulation in geology The numerical solution of collision problems Numerical modeling of composite materials Numerical modeling in Medicine Numerical modeling of seismic stability Numerical modeling of non-destructive railway control Robot-technique Grid-characteristic method
3 Numerical modeling of Arctic problems
4 Migration of iceberg
5 Picture of Ship s Damage R.E. Gagnon, J. Wang Numerical simulations of a tanker collision with a bergy bit incorporating hydrodynamics, a validated ice model and damage to the vessel // Cold regions. Science and Technology, 2012.
6 Collision between the ice-breaker and the ice-hummock
7 Impact of the ice hummock's keel on the seabed and on the underwater pipelines. M.A. Naumov, D.A. Onishchenko, Presentaion Gazprom VNIIGAZ LLC
8 Destruction of the iceberg under intense dynamic impacts
9 Destruction of the iceberg under intense dynamic impacts
10 The flow of ice floes towards the rack of fixed oil-extracting platform
11 Collision between the iceberg and the fixed oil-extracting platform 11
12 Structure of Ice-hummocks A. Marchenko Thermodynamic consolidation and melting of sea ice ridges // Cold regions. Science and Technology, V. 52, N. 3, 2008.
13 Ice-hummock model
14 Seismic exploration in the conditions of the Arctic shelf
15 Strimmer 3D P-waves High performance
16 Seabed stations 3D/4C High price High comprehension of obtained data
17 Geophysical prospecting by electric means seabed stations The leader of volume of work 6 components of the EM field (important for 3D inversion) Not smaller than 50 m EMGS,
18 Geophysical prospecting by electric means - strimmers PGS, High performance No deeper than 300 m One axial component of the field: Ex Frequency and time domain
19 Multilayered geological medium
20 Complicated interfaces
21 Complicated interfaces
22 Complicated interfaces
23 Seismic prospecting at the Arctic shelf
24 Wave pattern in the ice
25 Wave pattern in the water
26 Wave pattern in the ground
27 Wave pattern in the carbon reservoir
28 Problem defintions Source in the ice Source at the seabed Source in the ice, without reservoir Source at the seabed, without reservoir
29 Wave patterns
30 Seismograms from ice receivers, Vy Source in the ice Source at the seabed Source in the ice, without reservoir Source at the seabed, without reservoir
31 Seismograms from seabed receivers, Vy Source in the ice Source at the seabed Source in the ice, without reservoir Source at the seabed, without reservoir
32 Source at the bottom
33 Source at the bottom, without the reservoir
34 Numerical simulation in geology
35 Numerical simulation in geology
36 Cavities of various shape
37 The array of subvertical fluid filled cracks
38 The array of subvertical fluid filled cracks 0,5 The distance between cracks/ the length of craks 1,0 2,0 3,0 1,5 4,0
39 Simple fluid filled cavity Reflected P-wave Wave from the source Reflected wave
40 The numerical solution of collision problems
41 Collision with multilayered barrier
42 Penetration of striker into curved barrier
43 Aircraft collision with the pillar
44 Multilayer barrier
45 Multilayer barrier
46 Numerical modeling of composite materials
47 Composite materials Microstructure Matrix and filler Types of fibers and their orientations 3D structure of fibers 9
48 The impact on the stringer 30
49 The destruction of steel body during ricochet impact
50 Numerical modeling in Medicine
51 Head damage Dependence from the angle = -90 Maximum compression, Па Maximum stretching, Па Maximum shear stress, Па
52 Comparison with clinical results
53 Knee injury
54 Body armour and human chest
55 Numerical modeling of seismic stability
56 Seismic stability of the building Absolute velocity (left) and destruction zones (right) in red
57 Seismic stability of river plant вода земля плотина
58 Seismic stability of the building
59 Love and Rayleigh waves Love waves Rayleigh waves
60 Numerical modeling of non-destructive railway control
61 Dynamic impact on the rail
62 The influence of karst inclusions in the ground above the railway
63 Non-destructive railway control Without crack 1 mm 5 mm 10 mm 40 mm 74 mm
64 Robot-technique
65 Robot-technique
66 Robot-technique
67 Robot-technique
68 Robot-technique
69 Robot-technique
70 Grid-characteristic method
71 Grids Triangular unstructured grid Grids with various average step
72 Grids Curvilinear grids Tetrahedral grids
73 System of equations describing elastic and acoustic waves т v t v σ Elastic waves: v v vт t σ v I v v v v σ tension, density, velocity in the elastic media, stress, Lame s parameters, c p 2 speed of P-waves, 12 cs speed of S-waves. 12 Acoustic waves: v t v p v t pс v v density,v velocity in the acoustic media, p pressure, c 2 speed of sound.
74 Boundary and interface conditions Boundary Given traction r r Given Mixed σp f velocity of boundary r r v V boundary conditions Absorbing boundary contions Interface Continuity ofrthe velocity and traction r r r r va vb V, a b Free sliding conditions r r r r va p vb p, pa pb, a b 0 The interface condition between acoustic and elastic bodies
75 Thank you for your attention!
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