PDF | The main objective of the presented study was to compare the effectiveness of two standard test procedures for evaluating bus roof. he main objective of the presented study was to compare the effectiveness of two standard test procedures for evaluating bus roof integrity: the dynamic rollover. EUROPEAN TEST METHODS FOR SUPERSTRUCTURES. OF BUSES AND COACHES. RELATED TO. ECE R66 (THE APPLIED HUNGARIAN CALCULATION.
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The number of physical tests necessary to prove the concept was significantly reduced by performing the simulations for the bus rollover. The connecting structures between the bays shall represent the manufacturer’s description of the superstructure see Annex 4, Paragraph 3.
The following text extract indicates the scope exe the document, but does not represent the actual PDF content. These elements shall be identified by the manufacturer, in this design submission: This mass distribution shall express the energy absorbing capability and load bearing capacity of each bay. Masses were imposed according to a structured methodo dology.
Crash Analysis of an amphibious bus according to the ECE R66 regulations
The vehicle is repositioned on the four load-cells, with the front wheels chocked to prevent the vehicle rolling forward. The tilting platform shall be constructed to prevent the vehicle moving along its longitudinal axis.
Units of Measurement The units of measurement shall be: Brief summary of description of the superstructure in respect of Paragraph 3. Production Definitely Discontinued U Journal of Science, Vol.
FE model of the full vehicle was e66 comprised of first order shell elements, 73 spring elements and 44 mass elements ADMAS and 48 Rigid Elements. Strengthening bus frames to maintain residual space occupant space an and minimizing occupant injury are necessary. Although rollov lover crashes are not common, the number of seri eriously injured occupants was high as compared to other cr crash types , however, the research and intere erest related on its safety seemed relatively low.
The dynamic characteristics of a PH may be determined in two ways: In the case of an original body section taken directly from the actual vehicle layout, the basic and the additional connecting structures see Annex 4 Paragraph 3.
Each steered ecce shall be set to its straight-ahead steer position. Rollover, Buss Structure, R666 Residual Space, Finite Element Method hod Abstract Bus rollover is one of the most serious type pes of accident as compared to other modes of bus accidents nts. Presentation of measuring reports 2. A body section contains at least two bays connected by representative connecting elements side, roof, and underfloor, structures. Chang’an University,in Chinese.
R66 regulations was achieved. Maximum number of seats permitted to be fitted with occupant restraints The cross sectio ction of the residual space, perpendicular to the length is a trap apezoid and it runs through the length. Conformity of Production 8. The engine, power transmission, suspension and 6r6 axles were modeled by 1D element.
The Study of Bus Superstructure Strength Based on ECE R66
The midmid-surfaces of these CAD model were extracted, d, since most geometrical features of the bus have been defin fined with thickness, to proceed for shell-meshing. The mass distribution among the nominated bays; 1. Detailed drawings of the residual space according to Paragraph 5. The rigid and strength characteristic of bus superstructure were evaluated.
The number of loading steps shall exceed and the steps shall be quasi-equal. Click here to sign up. The individual load-cell readings shall be noted simultaneously and shall be used to check the total vehicle mass and centre of gravity position. A statement of the values of angle, velocity, and angular velocity at the unstable equilibrium position of the vehicle and at the position of first contact with the ground, 5.
InterRegs: Regulation No. | ECE – United Nations
ECE approvals t66 under this Regulation, in its original form, earlier than 60 months after the date of entry into force and all extensions of such approvals, shall remain valid indefinitely, subject to Paragraph A table of the value of the total energy and the values of all its components kinetic energy, internal energy, hourglass energyat time increments of 1 ms covering, at least, the period from first contact with the ground until the maximum deformation is reached, 5.
In most parts of the world, especia cially in Europe, safety requirements are ecd nuously visited to improve passenger safety in buses or coa oaches.
The length of a bay is measured in the direction of the longitudinal axis of the vehicle, and is determined by the distance between two planes perpendicular to the VLCP of the vehicle. The following requirements shall be met when defining the distribution of mass: Since wce are many seriously wounde ded passengers in traffic accidents of buses, more careful an analysis and e66 for impact accidents should uld be investigated. Requirements The superstructure of the vehicle shall have the sufficient strength to ensure that the residual space during and after the roll-over test on complete vehicle is unharmed.
Each steered wheel shall be set to its straight-ahead position. The survival space of the cab was proved to be sufficient for r666 safety of the driver. No additional physical tests were needed for obtaining the required certifications.
A ecw showing the mathematical model of the superstructure, 5. The additional elements which do not contribute to the structural strength of the vehicle but which may intrude into the residual space, for example: