Course detail

Road Accident Analysis I

ÚSI-1ECASAcad. year: 2010/2011

Subject is aimed at basic disciplines, which are being used for road accident analysis.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

prof. Ing. Albert Bradáč, DrSc.

Department

Institute of Forensic Engineering (ÚSI)

Learning outcomes of the course unit

Then the student will have superior basics for next development of knowledge and skills in connection with road accident analysis

Prerequisites

Not requested.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Condition for crediting is to attend the trainings and to elaborate a semestral work.
Exam will consist of written part and oral part.

Course curriculum

1. Fundamental quantities of the road accident analysis, their units and sources of their values constituted into calculations. Numerical solution methods of certain integral, methods of equation roots numerical solution.
2. Basic relations for calculation of even translatory linear movement and evenly accelerated translatory linear movement. Basic relations for calculation of even rotational motion and evenly accelerated rotational motion.
3. Laws of motion. Forces acting at the vehicle movement by curve at level, banked, at slope, at vertical and in sag curve, their description and formulas deriving. Vehicle limit velocity in curve. Formulas deriving and their analysis.
4. Vehicle resistance-powers and their estimation. Mathematical model of course of vehicle driving and braking.
5. Analysis of braking at straight-ahead driving (at level and slope, including formula deriving). Roll moment at braking and cornering, dependence on height on gravity centre. Alternation after placing a baggage on the top of the vehicle. Lateral deflection of the wheel at drive and formation of normal force.
6. Adhesion circle and adhesion ellipse, their equations, consequences for vehicle movement. Coefficient of adhesion and kinetic friction, common values. Connection between available tyre adhesion and vehicle retardation. Use of adhesion with ABS. Adhesion at vehicle drive away, maximal acceleration, effect of powered axle (axles), division of loaded axles.
7. Man as an element of the system; visual and auditory perception, driver reaction time and vehicle response (dividing, description of separate parts and their duration). Biomechanical aspects of expert investigation (foot-passenger movement velocity, estimation of the human body moment of inertia, extreme situations and their impact on human - diagram orientation). Alcohol at technical analysis of accident course and causes.
8. Impact of body analysis - impact direct, angular, centric, eccentric, restitution coefficient. Collision analysis - general principles. Conservation laws and other used laws, formulation and use.
9. Velocity appropriate to visibility - general equation, deriving for driving straight. Lateral movement of the vehicle by one and two curves. Kovařík formula and its deriving. Substituted values.
10. Basic methods used in road accident analysis. Forensic engineer comparison. Method of reducing limits at accident analysis.
11. System road accident analysis (road accident system, its elements or subsystems, terminology and values used in accident analysis, their units, values estimation methods).
12. Selected properties of separate elements of accident system, which are important for accident analysis including the basic values.
13. Graphical accident analysis (interval diagram, trajectory-time diagram, combined diagram).

Work placements

Not applicable.

Aims

Goal of this subject is to obtain preliminary theoretical knowledge for consequential subject Road accident analysis II. Students shall be acquainted with selected texts from mathematics and physics, forensic medicine, biomechanics and criminology, collision phenomenon dynamics and visual perception of driver.

Specification of controlled education, way of implementation and compensation for absences

Attendance is checked in attendance sheet.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

BRADÁČ a kol. Soudní inženýrství. AKADEMICKÉ NAKLADATELSTVÍ CERM, s.r.o., Brno 1997 ISBN 80-7204-057-X
BRADÁČ A., GLIER L., KREJČÍŘ P., PEŘINA J. Znalecký standard č. II, III, IV, V. MSp Praha, ÚSI VUT v Brně, 1990 - 1992, Aktualizace 2002