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7/27/2019 RISER Seminar P5 C.klootwijk Accident Analysis
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SEMINAR on Safer Roadside Engineering
Makadam Club Budapest, November 30, 2005
Web: www.riser-project.com
E-mail: [email protected]
EU Competitive and SustainableGrowth Programme
Accident analysis and the responseof the infrastructure
Cees Klootwijk, TNO
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 2
Accident analysis and the response of the infrastructure
Type of analysis
Examples
Use to developregulations/guidelines
7/27/2019 RISER Seminar P5 C.klootwijk Accident Analysis
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 3
Scope of the accident research
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 4
Type of analysis
National statistics database
Detailed database
Reconstructions
Simulations
Existing regulations
Regulations
guidelines
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 5
National Statistics and Detailed data
Overview risks per country Focus on where to put effort
Performance check of regulation
Check of long term targets
Overview detailed parameters Insights in accident mechanisms Comparison simulation with real world
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 6
National / Detailed database
Example database
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 7
National / Detailed database
Example database
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 8
Simulations
Technical
Vehicle dynamics simulation
Multi body simulation
Finite element simulation
Human factors
PC-Crash (dynamics and crash simulation)
Driver simulator
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 9
General reconstruction
Reconstruction of accidents
Phases
Pre crash
Crash
Post crash
Results
Human factors-what did the driver do before
Impact parameters
Post crash dynamics
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 10
Reconstruction examples
Tree accident
Ditch accident
Embankment accident with rollover
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 11
Reconstruction example tree
Example PC-Crash (reconstruction program )
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 12
Reconstruction example ditch
to be added
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 13
Reconstruction Results
Level 1
Level 2
Level 3
Level 4
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 14
Reconstruction Results
Input parameter
Direction
Speed
Vehicle
Output parameter
Pre-impact trajectory
Impact speed
Energy dissipation inimpact
Post-impact trajectory
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 15
Reconstruction Example Embankment
Simulation
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 16
Finite Element Simulation
Simulation in detail
Insights on micro level of constructions
Decisions on material choice
Technical analysis regulations
Two examples
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 17
Finite Element simulation
Example simulation
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 18
Pole impact
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 19
Finite Element simulation result
General: Effective for all passenger cars
Current regulations
Actual commercial designs
Possible alternatives: Concrete
Wood
Specific: Breakaway poles still meeting EN 40-3 are better than
rigid poles to reduce injuries
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 20
Madymo Simulation
Focus on occupants
Injury
Simple representation of objects
No detailed constructional behaviour
General regulations like ASI
Benchmarking vehicle-roadside
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 21
Madymo simulation
Pole impact (head impacts pole)
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 22
Madymo simulation
Example Madymosimulation
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 23
Results
HIC-ASI relationship
Level 2
Level 3
Level 4
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 24
Engineering methodology
ACCIDENT DATA
ANALYSIS
Provide real world crash
performance
Support decision making of
road equipment
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 25
Crash test data restraint systems
Overview available data
Basis for comparison
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 26
Existing regulation
Level 1
Level 2
Level 3
Level 4
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 27
New guidelines
How to use the results
Trends
Check maximum values
Check decisions
Preview recommendations
Check existing guidelines
RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 28
Result
Real world data<>simulations showseffective way of improving roadside safety
Assessment of the effect of non-standardconditions in road restraint systems.
Balance between generic and productoriented results.
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RISER SEMINAR on Safer Roadside Engineering, Nov. 30, 2005 29
Accident analysis
questions
