The paper investigates and shows the efficiency and accuracy of the Craig-Bampton model order reduction method on the analysis of a cantilever beam and rod with harmonic excitation. The results of different finite element- and Craig-Bampton models are compared to the analytical (closed-form) continuum vibration results as reference.

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.

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.

In Hungary, as in other countries around the world, intervention firefighting units often use a mechanically operated aerial ladder for high-altitude rescue tasks. The safe operation of the equipment is only possible under strict safety regulations and requires a high level of expertise from the operating staff. During each intervention, extraordinary events such as sudden wind gusts can occur, which can cause extreme overload of the structural members of aerial ladders and have adverse effects on the equipment that can lead to malfunctions and - even worse - to accidents. Therefore it is important to study the consequences of external influences on aerial ladders during operation. The examination was performed on a widely used Magirus M32-L aerial ladder. The reason for choosing this type of aerial ladder is because it has a wide operating range, therefore test results can be a good starting point for other similar equipment as well. In this paper the development of our beam model and the performed finite element simulations are presented. The aim of the research is to develop a model based on geometrical measurement data that is suitable for studying the effects of wind gusts on the ladder structure. With our research, we aim to contribute to the safe operation of aerial ladders and to prevent possible accidents.

This study presents a finite element-based failure analysis and geometric optimization of a clamping jaw for heavy-duty drivetrain components. Upgrading the spindle size to prevent torque-induced failures critically thinned the jaw wall, causing repeated structural fractures. To safely accommodate a higher-capacity intermediate spindle, 3D linear static Finite Element Analysis (FEA) was combined with a Box–Behnken design (BBD) and response surface methodology (RSM). This surrogate-based optimization successfully identified a practical geometric configuration that restored stresses to an empirically safe baseline level, validated by confirmatory FEA. Finally, analytical verification of the new spindle confirmed that, alongside the geometric redesign, upgrading the material to high-strength alloy steel is required to withstand extreme manual overloads. This combined methodology provides a reliable design framework for industrial clamping mechanisms.