Péter Horváth

57193992991

Publications - 7

Computational Procedure for Determining the Shear Yield Stress-Shear Deformation Relationship in Magnetorheological Fluids from Anton-Paar Measurement Data

D. Törocsik Péter Horváth

Publication Name: Strojnicky Casopis

Publication Date: 2024-11-01

Volume: 74

Issue: 2

Page Range: 25-34

Description:

In the past decade, magnetorheological fluids have been applied in various devices. This article focuses on developing a new computational procedure to determine the shear strength-shear strain relationship of magnetorheological fluids from the measurement data obtained by using an Anton-Paar rotational viscometer.

Open Access: Yes

DOI: 10.2478/scjme-2024-0022

Comparative Study of Model Order Reduction Methods via Truss Vibrations

Péter Horváth

Publication Name: Advances in Transdisciplinary Engineering

Publication Date: 2024-01-01

Volume: 59

Issue: Unknown

Page Range: 209-216

Description:

The paper examines the accuracy of various model reduction techniques via modal analysis of a truss structure. Besides the widely used Craig-Bampton (CB) method in commercial software, three additional methods - modal truncation augmentation (MTA), system equivalent reduction expansion process (SEREP), and the Rubin method - are briefly introduced. Subsequently, the results provided by these methods are investigated through the comparison of natural frequencies, mode shapes, and frequency response functions. The study reveals that generally, the Rubin method provides the most accurate results, except in higher frequency ranges where its error suddenly spikes. With the MTA method, accuracy can be improved at low frequencies, but the error gradually increases. In the case of SEREP, the error remains approximately constant, resulting in larger errors at low frequencies and smaller errors at high frequencies compared to other methods.

Open Access: Yes

DOI: 10.3233/ATDE240547

INVESTIGATION OF TRAFFIC INDUCED DYNAMIC RESPONSE OF A BRIDGE

Zoltán Major P. Szalai Péter Horváth F. Hajdu Rajmund Kuti M. Brinissat Antal Apagyi Cs Papp

Publication Name: Strojnicky Casopis

Publication Date: 2023-05-01

Volume: 73

Issue: 1

Page Range: 85-102

Description:

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.

Open Access: Yes

DOI: 10.2478/scjme-2023-0007

Stair Climbing Aid Devices as Parts of Sustainable Healthcare

Péter Horváth F. Hajdu Attila Nagy

Publication Name: Chemical Engineering Transactions

Publication Date: 2023-01-01

Volume: 107

Issue: Unknown

Page Range: 325-330

Description:

An important aspect of a sustainable society is the care of elderly people. For a sustainable society, it is necessary to develop cost-effective, culture-appropriate, and sustainable eldercare services, which should guarantee both safety and quality. It is also important to prolong the time in which elderly people can live independently to contribute to sustainable healthcare. For elderly people, a daily activity, climbing stairs, might be difficult. This paper presents an overview of stair-climbing aid devices. The paper introduces the sustainable healthcare of elderly people. Then, different stair-climbing aid devices are explained and analyzed, ranging from passive ones to high-tech stair-climbing exoskeletons. A prototype of a new solution, which is an Intelligent Crutch, is presented. After elaborating on the design criteria, the detailed conceptual design and the working principle of the device are presented. The presented concept fills a gap between expensive and complicated stair climbing aid devices and simple and cheaper solutions. It is cheaper and simpler than the active, complicated stair-climbing devices but performs almost the same function. The device helps elderly and disabled people to climb stairs alone, thus improving the quality of life of the target group. The study concludes with further development tasks in order to help elderly people and contribute to a sustainable society.

Open Access: Yes

DOI: 10.3303/CET23107055

Investigation of swings caused by sudden wind loads during operation of an aerial ladder

Péter Horváth F. Hajdu Rajmund Kuti

Publication Name: Fme Transactions

Publication Date: 2020-01-01

Volume: 48

Issue: 2

Page Range: 351-356

Description:

In Hungary, as in other countries around the world, intervention firefighting units often use a mechanically operated aerial ladder for highaltitude 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.

Open Access: Yes

DOI: 10.5937/FME2002351H

Efficiency and accuracy investigation of the Craig-Bampton method through continuum vibration tests

Péter Horváth

Publication Name: Aip Conference Proceedings

Publication Date: 2018-01-05

Volume: 1922

Issue: Unknown

Page Range: Unknown

Description:

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.

Open Access: Yes

DOI: 10.1063/1.5019121

Determination of Measurement Parameters for Vibration Analysis by Bus

P. Szalai Péter Horváth F. Hajdu Rajmund Kuti M. Brinissat Antal Apagyi Cs Papp

Publication Name: Strojnicky Casopis

Publication Date: 2022-11-01

Volume: 72

Issue: 2

Page Range: 189-200

Description:

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.

Open Access: Yes

DOI: 10.2478/scjme-2022-0028