Development of a Detailed Multi-Body Computational Model ... · Presentation Outline . Goal ....
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Development of a Detailed Multi-Body Computational Model of an ATV to Address and Prevent Child Injuries Chandra K. Thorbole , Ph.D. MADYMO USERS MEETING September 27, 2016 UMTRI ,Ann Arbor, MI
Transcript of Development of a Detailed Multi-Body Computational Model ... · Presentation Outline . Goal ....
Development of a Detailed Multi-Body Computational Model of an ATV to Address and Prevent Child Injuries
Chandra K. Thorbole , Ph.D.
MADYMO USERS MEETING September 27, 2016
UMTRI ,Ann Arbor, MI
MADYMO USERS MEETING UMTRI, University of Michigan
September 27,2016
Presentation Outline
Goal
Research Importance
Engineering Intervention
Observations
Discussion
MADYMO USERS MEETING UMTRI, University of Michigan
September 27,2016
What is an ATV ? An ATV (All Terrain Vehicle) is a off-road gasoline powered engine vehicle with straddle seat and handle bar for steering inputs. ATV’s are considered as rider active vehicle as the rider shift their body weight to precisely control the ATV and its stability during turns.
Image Source : GAO-10-418 Report
Engine size < 90 cc 90 cc <Engine size < 1000 cc
MADYMO USERS MEETING UMTRI, University of Michigan
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ATV use in the U.S In the U.S the major use of an ATV is for recreational activity followed by farming and industrial application.
Graph Source : GAO-10-418 Report
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Young riders and adult ATV ATV’s are rider active machines and because of their design, ATV's are dynamically unstable and require the operator to perform balancing act while riding to maintain the ATV stability. Young riders on adult ATV’s are unable to reach foot paddle, fail to execute the active participation as required by the ATV’s during operation. This lead to fatal accidents of young rider on adult ATV’s.
MADYMO USERS MEETING UMTRI, University of Michigan
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ATV related fatalities & injuries among young riders in the U.S
ATV-related injury admissions to ACH 2000-2010
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Main focus of this research phase is the primary prevention (Accident prevention)
Goal
Injury Prevention
Primary Prevention Secondary Prevention
Primary Focus is preventing the accident
occurrence
Primary Focus is preventing the occupant
injury during the accident
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Goal
Primary Prevention
Social Awareness
Behavior Change
Law
Education
Technology
Engineering
Innovation
Evaluation
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September 27,2016
Social Awareness Behavior changes
Law Education
Technology Engineering Innovation Evaluation
Successful Injury
Prevention
Research Importance
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Engineering Intervention
Engineering Method
Educational Intervention
Method
In this research phase
Complements
Engineering simulations are used to evaluate ATV and young rider motion for a particular accident mechanism. This motion information will be used to create more realistic video for educational purpose.
How?
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Engineering Intervention
ATV MADYMO Model
Laboratory Testing For ATV Dynamic Characteristic
CAD model
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Engineering Intervention
C.G. Identification
Mass Moment of Inertia
Suspension Characteristic
C.G Mxx
Myy
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Computational Model
Engineering Intervention
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Engineering Intervention
Tilt Table Test
Experimental Result 43.5 deg
Computational Result 45 deg
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MADYMO USERS MEETING UMTRI, University of Michigan
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Drop Test
Engineering Intervention
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September 27,2016
Engineering Intervention
Image Source : GAO-10-418 Report
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Engineering Intervention
Accident Scenario 1
How the ATV speed and the slope characteristic influence the injury kinematics?
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Factorial Design
Engineering Intervention
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0.38 sec 0.78 sec 1.18 sec
1.38 sec 1.58 sec 1.72 sec
ATV Speed 10mph Slope 30 degree Slope length 2m
Observation
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Future Work
Motion Data Output
MAYA 3D Animation software
Engineering Method Accident Mechanism Realistic Video Generation
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Primary Hypothesis
“ The crash scenario intervention would shift parental risk perception of ATV use by Children from safe to unsafe”
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MOVIE
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Perception of adult ATV’s as unsafe for children changed from 48% (pre-intervention) to 73% (Post-intervention) Video intervention caused parents to perceive adult ATV’s unsafe for children's.
Young and non-Caucasian parents were more likely to encounter change in belief.
MADYMO USERS MEETING UMTRI, University of Michigan
September 27,2016
