Using PC Crash simulation program to determine optimum width of access road

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Invention Journal of Research Technology in Engineering & Management (IJRTEM) ISSN: 2455-3689 www.Ijrtem. com Volume 3 Issue 6 ǁ September-October 2019 ǁ PP 50-56

Using PC Crash simulation program to determine optimum width of access road 1, 1,2

Ján Mandelík, 2,Bohumil Šejnoha

Department of Transport Safety, University of Security Management in Košice, Košice, Slovak Republic

ABSTRACT:The article deals with the possibility to use the PC Crash simulation program in order to calculate the alternative movements of a vehicle when entering an access road of a private land from a public road. The article demonstrates a procedure of an expert on road transport and means of transport in calculations for individual types of vehicles that may actually enter the land in question. In addition, it shows the results of simulations which take into account real vehicle properties, such as the influence of the vehicle suspension on its movement, actual conditions of a drive-away of vehicles and their change of direction, i.e. a directional deviation of tyres, steering of individual wheels of the front axle and other influences on the final calculation. In conclusion, the outcome of described expert procedures and their impact on the final assessment are presented.

KEY WORDS: Simulation program, optimum vehicle movement, land, calculation of vehicle entry I.

INTRODUCTION

The PC Crash calculation program, designed to analyse accidents in road traffic, represents a calculation tool which by means of complex mathematical procedures, in particular the Kudlich-Slibard crash model, the impulse mirror method and moment mirror method, the kinetic drive simulation, as well as forward simulations enables to calculate the vehicle movement which could be considered sufficiently realistic. The vehicle movement simulations in this program are validated with respect to actual vehicle movements under specified conditions and, based on this, they are understood and recognized as practically identical. The use of the above program in order to carry out analyses of accidents involving vehicles, motorbikes, bicycles and pedestrians is generally known in various countries around the world and fully accepted by courts. Due to its features, the PC Crash program can also be used to solve problems not directly associated to car accidents. As shown below, it may be used to calculate the movement of a chosen vehicle and its manoeuvring when entering a private land from a public road in order to assess and determine the width of entry, assuming that the stated problem could not be solved comprehensively, accurately and efficiently enough in any other way with respect to time consumption. The presented calculations include technical data of individual vehicles chosen for the simulation and the movement alternatives of manoeuvring and subsequent entry to the specified land, provided that the entry meets the condition of the smallest width possible.

II.

CALCULATION CONDITIONS

Calculation method:The analysis of the vehicle movement will be carried out by means of a calculation and the authorised PC-Crash program, ver.12,1, (the licence owner - Ing. JánMandelík, PhD.)via a forward calculation with a vehicle movement simulation until the final positions are reached, using a 3D mathematical model. The simulation results in the input values that describe the vehicle movement under specified conditions as precisely as possible. This program calculates the positions and speeds of the vehicles and any other kinetic variables necessary to assess the vehicle movement with high accuracy – taking possible real and accidental influences of ±5% into consideration, whereas in this particular case the value of -5% may not be taken into account (which results from the nature of the task). Land: The situation is shown in Fig.1 and the measuring method is shown in Fig.2

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