In case of field measurement it is essential to determine the measurement conditions. With accurate parameter identification credible measurement and simulation results can be achieved. In this paper the parameter identification of a CSD-755-10 heavy-duty fire truck suspension for vibration analysis is presented, which is an important base-point for further research.

In Hungary, the quality of lower class roads is inadequate in many cases. Road irregularities cause different vibrations in vehicles. It is important to examine the vibrations generated in vehicles by a given road section as they can lead to a reduction of lifetime or even an immediate failure of suspensions and other structural components. Recently several fire trucks with special vehicle body have also experienced structural failures which have possibly been caused by vibrations from road irregularities. To prove our assumption field measurements were carried out with the Csepel-Metz 755-10 heavy duty fire truck on a selected road section. In this paper the results of numerical simulations and field measurements with a special fire truck is presented. The aim of our research is to draw attention to the importance of the topic and to contribute to the safe operation of fire-fighting vehicles.

From the point of view of field examinations, especially in the case of measurements done by instruments, it is crucially important to determine measurement conditions. Accurate identification of parameters enables accurate and certified measurement results to be achieved. In our work, we represent the determination of measurement conditions for harmful vibrations occurring during urban road transport of an Ikarus 55 type long-haul bus. This is a favourable basis for further vibration analysis regarding other buses.

Bridges are special structures that provide a transport connection between areas divided by a physical barrier. Vehicles passing over bridges cause vibrations in the structural elements of the bridge, which can damage these structural elements over time. The aim of our research was to investigate the vibrations generated by vehicles on Hungary’s first steel girder welded bridge, which was subjected to the maximum allowable load. In this paper, we describe the measurements we have carried out, analyse the results, present the vehicle-bridge interaction model we have constructed and the computer simulation we have carried out by using it. Our research results are intended to contribute to accident prevention and the safe operation of bridges.