ROBUSTComputational Mechanics
Results and Comparison
Workshop in Brussels 30.05.2006
Kristin Johannessen Force Technology
Norwegian Public RoadsAdministration
Rob
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GR
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Workshop, Brussels May 2006
Vehicle models
Light vehicle model:• GeoMetro R0 – Original, downloaded from NCAC and
improved by NPRA, SNRA, Force• GeoMetro R1 – Included spinning wheels by POMI• GeoMetro R2 – R1 + seats, seatbelts and gebod by
NPRA/Force• GeoMetro R3 – R1 + steering and suspensions by POMI• GeoMetro R4 – R3 + seats, seatbelts and gebod by
NPRA/Force• Generic (Fiesta) – Developed by TRL
Bus Model (13t) – based on Scania and modified by NPRA, SNRA, Force
10t Heavy weight vehicle model – developed by POMI
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Workshop, Brussels May 2006
Barriers
10t lorry_R1VarioGuard - H2B3GM_R3 and GM_R4Super-rail® plus - H3B2
BusVarioGuard - H2B3
GM_R2 and GM_R3ESP - N2B1GM_R1Concrete barrierB5Vehicle model for impactDescription of barrierBarrier
All barriers delivered by Volkmann & Rossback GMBH & CO.KG, as Robust partner
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Workshop, Brussels May 2006
Steel ESP N2 (Barrier B1)
Barrier delivered by Volkmann & Rossback GMBH & CO.KG, as Robust partner (picture from TRL)
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Workshop, Brussels May 2006
ESP N2 – Input parameters
• Versions of GM• Impact speed• Vehicle test mass• Barrier boundaries (foundation, ends)• Material data• Friction (wheel asphalt)
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ESP N2 - Results
ASI
0,00
0,10
0,20
0,30
0,40
0,50
0,60
0,70
0,80
0,90
POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)
ASI
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Workshop, Brussels May 2006
ESP N2 - Results
ASI
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)
ASIStd. Dev: 0,07Mean: 0,8
Comparable simulations; fixed at ground level -180mm
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Workshop, Brussels May 2006
ESP N2 - Results
Working Width and Deflection
0
100
200
300
400
500
600
700
800
900
POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)
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Workshop, Brussels May 2006
Measurement of W
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Workshop, Brussels May 2006
ESP N2 - Results
Working Width and Deflection
0
100
200
300
400
500
600
700
800
900
POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)
W: Std. Dev: 33Mean: 787
D: Std.dev: 69Mean: 679
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Workshop, Brussels May 2006
ESP N2 - Results
ASI
0,00
0,10
0,20
0,30
0,40
0,50
0,60
0,70
0,80
0,90
TRL - Case 1 NPRA - Case4
NPRA - Case1
POMI - Case 2
GM_R2GM_R4
Rob
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Workshop, Brussels May 2006
ESP N2 - Results
Rob
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Workshop, Brussels May 2006
ESP N2 – Comparison full-scale test
ASI - Working width
0,50,55
0,60,65
0,70,75
0,80,85
0,90,95
600 700 800 900 1000Working w idth
ASI
Full scale_Soil Simulation_spring Full scale_Asph-BetSimulation_+30 Simulation_-200
ASI: Simulation
Std. Dev: 0,08Mean: 0,75
Full scale test:Std.dev: 0,08Mean: 0,79
W: Simulation
Std. Dev: 63Mean: 834
Full scale test:Std.dev: 83Mean: 758
Rob
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Workshop, Brussels May 2006
ESP N2 – Comparison full-scale test
W-normalised: Simulation
Std. Dev: 50Mean: 779
Full scale test:Std.dev: 76Mean: 730
With normalised Working width
0,450,500,550,600,650,700,750,800,850,900,95
600 650 700 750 800 850 900
Working width
ASI
SimulationsFull-scale tests
W: Simulation
Std. Dev: 63Mean: 834
Full scale test:Std.dev: 83Mean: 758Normalised according to prEN 1317-2:2005;
Impact energy related
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Workshop, Brussels May 2006
Concrete (Barrier B5)
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Workshop, Brussels May 2006
Concrete - Input parameters
• Vehicle versions (GM_R2 vs. GM_R0)• Vehicle test mass• Friction barrier vs. vehicle
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Workshop, Brussels May 2006
Concrete - resultsASI
0,00
0,50
1,00
1,50
2,00
2,50
POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)
GM
_R0
GM
_R4
GM
_R0
GM
_R4
GM
_R0
GM
_R4
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Workshop, Brussels May 2006
Concrete - results
Time = 0,05 sec Time = 0,08 sec Time = 0,05 sec
Time = 0,10 sec NA Time = 0,10 sec
POMI – GM R4 TRL – GM R4 NPRA – GM R4
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Workshop, Brussels May 2006
Concrete - results
Time = 0,15 sec Time = 0,16 sec Time = 0,15 sec
Time = 0,20 sec Time = 0,24 sec Time = 0,20 sec
POMI – GM R4 TRL – GM R4 NPRA – GM R4
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Workshop, Brussels May 2006
Concrete – comparison full-scaletest
ASISimulation:
Std. Dev: 0,09Mean: 1,87
Full-scale test:Std.dev: 0,15Mean: 1,73
ASI - Energy
1,4
1,5
1,6
1,7
1,8
1,9
2
2,1
40 41 42 43 44 45 46 47 48
Energy (J)
ASI Simulation
Full scale
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Workshop, Brussels May 2006
SuperRail Steel H3 (Barrier B2)
Picture from TRL
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Workshop, Brussels May 2006
SuperRail – Input parameters
• Different version of GeoMetro used• Fixation to ground different• End boundaries different• Slightly different material data
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Workshop, Brussels May 2006
SuperRail - Results
ASI
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
POMI (LS-DYNA) NPRA (LS-DYNA)
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Workshop, Brussels May 2006
SuperRail - comparison with full-scale test
ASI - Working Width
1,00
1,10
1,20
1,30
1,40
1,50
1,60
1,70
500 600 700 800 900 1000
Working Width
ASI Simulation
Full scale
ASISimulation:
Std. Dev: 0,12Mean: 1,49
Full-scale test:Std.dev: 0,14Mean: 1,25
Rob
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GR
D1-
2002
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21
Workshop, Brussels May 2006
VarioGuard Steel H2 (Barrier B3)
Picture from www.volkmann-rossbach.com
Rob
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Workshop, Brussels May 2006
VarioGuard – input parameters
• Three different vehicles have been used:– 10t Lorry– 13t Bus– Small car (GeoMetro)
Rob
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2002
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21
Workshop, Brussels May 2006
VarioGuard
Time = 0,4 sec Time = 0,45 sec Time = 0,40 sec
Time = 0,80 sec Time = 0,75 sec Time = 0,80 sec
NPRA – 10t POMI – 10t NPRA – Bus
Rob
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Workshop, Brussels May 2006
VarioGuard – comparison with full-scale test
W – 10t LorrySimulation:
Std. Dev: 158Mean: 2198
Full-scale test:Std.dev: 58Mean: 2267
Working Width - Impact Energy
200,00220,00240,00260,00280,00300,00320,00340,00360,00
2000 2100 2200 2300 2400 2500
Working Width
Ener
gy
Simulation - Lorry 10t Full scale - Lorry 10t
Simulation - Bus Full-scale - bus
Rob
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GR
D1-
2002
-700
21
Workshop, Brussels May 2006
ROBUSTComputational Mechanics
Results and Comparison
Workshop in Brussels 30.05.2006
Kristin Johannessen Force Technology
Norwegian Public RoadsAdministration