Surf Zone/Beach Zone (SZ/BZ) Obstacle Reduction Capt R.W. Paterson
Feb 05, 2016
Surf Zone/Beach Zone (SZ/BZ) Obstacle
Reduction
Surf Zone/Beach Zone (SZ/BZ) Obstacle
Reduction
Capt R.W. Paterson
The ThreatThe Threat384 m
20 m10 m
10 m
AL Mines (E, L)
AT mines (A, B, F, G, H)
4 strand fence
AP mine (K)
Tanglefoot
Hedgehog 1.25-m members
50 m
10 m
0.6 m
1.2 m1.3 m1.1 m0.9 m
3.0 m
30 m 30 m
Water Depth (m)Profile At Mean Tide. 6-8 ft Tidal Variations (+3-4 ft about mean tide)
10 m
30 m
1.6 m
10 m
Type 2 AL Mines (J, M)
0.3 Triple Strand Concertina Wirew/AP mines
Sea Urchins
20 m10 m
1.8
15 m
15 m
BackgroundBackground
• Currently no program of record to deal with SZ/BZ obstacles
• PGMs thought to hold some promise for a near term solution (tied to USAF support)
• Began working this problem in Germany• Invited to be part of the IPT for JDAM
Assault Breaching System (JABS)• Incorporating results from live fire tests
The Skeptics The Skeptics
• “This is a physics problem”
• “Agent based tools won’t work”
• “It’s just too hard”
PhysicsPhysics
• Mathematical representation of the behavior of the natural world– Newton’s Laws of Motion– Einstein’s Theory of Relativity
• We have physical results from live fire tests
-50
-40
-30
-20
-10
0
10
20
30
40
50
Y Location
180 190 200 210 220 230 240 250 260 270 X Location
Bomb Hedgehog Tetrahedron
H1
H2
T4
T3
T2
T1
H3
-50
-40
-30
-20
-10
0
10
20
30
40
50
Y Location
180 190 200 210 220 230 240 250 260 270 X Location
Bomb Hedgehog Tetrahedron
H1
H2
T4
T3
T2
T1
H3
Arena #1
Surf Zone TestsMk 82 Pond Test – Half Buried (March
2002)
20
30
40
50
60
120 130 140 150 160 170 180 X Location
Bomb Hedgehog Tetrahedron
H1H2
H3
T4
T3 T2
T1
20
30
40
50
60
120 130 140 150 160 170 180 X Location
Bomb Hedgehog Tetrahedron
H1H2
H3
T4
T3 T2
T1
Arena #2
Bomb Buried to ½L Water Depth of 3 Feet
-35
-25
-15
-5
5
15
25
35
45
Y Location
140 150 160 170 180 190 200 210 220 230 X Location
Bomb Hedgehog Tetrahedron Mine
H1
H2
H3
H4
T4
T3
T2T1
M1
M2M3
M4M5
-35
-25
-15
-5
5
15
25
35
45
Y Location
140 150 160 170 180 190 200 210 220 230 X Location
Bomb Hedgehog Tetrahedron Mine
H1
H2
H3
H4
T4
T3
T2T1
M1
M2M3
M4M5
• Note - M5 and M4 moved towards the bomb
Plume
Surf Zone TestsMk 84 Pond Test – April 2002
Mine Vulnerability to ExplosiveNeutralization VS 1.6 Anti-Tank Mine
1 10 100 1,000 10,000
Normalized Impulse
1
10
100
1,000
Normalized Peak Pressure
All Data Sources
KilledSurvived
26/27 NeutralizedI>200 and P>18
MK 80 Series BombsPredicted Lethal Radius (Feet) for Mines**
* Killed out to 21 feet in summer 2000 tests** Testing on-going
MineType
Bomb A
Bomb B
Bomb C
6’ 3’ 6’ 3’ 6’
A 20* 14 24 16 31
B 10 9 14 10 19
F 17* 12 21 14 28
G 17 12 21 14 28
H 17 12 21 14 28
Depth Depth Depth Depth Depth
The Physics Behind the ProblemThe Physics Behind the Problem
6 ft. ~ 5O’ MVMT30’ KILLED
More Mines Moved
More Mines Killed
KILL 2-3 M
~
Agent Based DistillationsAgent Based Distillations
• Digital Mathematics used to simulate the simplified behavior of our human and natural world
• Question: Can agents that represent physical objects (mines) and not people be given behaviors that simulate physics
Questions Questions
• Can well placed Mk 80 series bombs effectively create assault lanes?
• How precisely must landing craft navigate given varying assault lane widths?
• How does the knowledge of obstacle location affect clearance?
• How many sorties need to be flown, how many weapons need to be dropped?
New Questions from the WeekNew Questions from the Week
• What tactics need to be employed against varying threats?– Channeling – Belt strikes– Point strikes
• JDAM versus standard Mk-80• How do we create the output we
need?
0
1
2
3
4
5
6
7
8
10 15 20 25 30 10 15 20 25 30 10 15 20 25 30 10 15 20 25 30 10 15 20 25 30
10 20 30 40 50
1
2
3
Drop Page Fields Here
Average of AAAV.FinalDead
Mine.location.proximity Aimpoint.location.proximity
Bomb.type
What is HappeningWhat is Happening
Total
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
Total
Drop Page Fields Here
Average of AAAV.Final.Dead
Drop More Series Fields Here
Biggest SurpriseBiggest Surprise
• Cost of Jack and Coke at Rocky Point
• $12• Dinner for 9 at Rocky Point• $453• Unexpected discovery that LESS
precision is better• Priceless