![]() Potential errors of acoustical testing induced by stinger excitation. VEHOVSZKY, B., GOÓR, D., FESZTY, D., GAZDAGH, Z., RÁBEL, A.In: Journal of Vibration and Acoustics, Vol. Identification of principal rigid body modes under free-free boundary condition. Computation of modal properties of two types of freight wagon bogie frames using the finite element method. DIŽO, J., HARUŠINEC, J., BLATNICKÝ, M.NVH and modal analysis in vehicle industry. SCHWEIGHARDT, A., VEHOVSZKY, B., FESZTY, D.Prepublished online: JPublished: AugShow citation The project titled "Internationalisation, initiatives to establish a new source of researchers and graduates, and development of knowledge and technological transfer as instruments of intelligent specialisations at Széchenyi István University" (project number: EFOP-3.6.1-16-2016-00017). Keywords: Acoustics, Modal Analysis, Eigenmode, Eigenfrequency, Coherence Grants and funding: Thanks to the presented techniques, the coherence curves managed to be improved and the results of the simulation and the measurement were found to be in good agreement. Hence one of the goals was to improve the coherence curves of the FRFs. For this reason, the details of the measurement setup will be included. However, one dominant factor of a modal analysis is to find the optimal measurement setup. In order to provide good quality results, the processing and evaluation of the simulated and measured data has to be done properly, which is discussed in detail. The excitation signals were provided by a shaker connected to the chassis. The measurement part of it was based on measuring the FRFs (Frequency Response Functions), with the help of accelerometers fixed at the nodes of the frame. The simulation part of the applied analysis was based on dynamic FEM (Finite Element Method). This analysis was performed to determine some of the modal parameters, in order to reduce the noise of the vehicle, the probability of a component failure and to improve the comfort. First, it introduces the applicability of modal analysis, then the modal analysis of a lightweight vehicle chassis will be detailed, which is the focal point of this paper. This document presents the characterization of the dynamic mechanical properties of a racecar's frame. Manufacturing Technology 2020, 20(1):84-91 | DOI: 10.21062/mft.2020.013 Modal Analysis of the Tubular Space Frame of a Formula Student Race Car Attila Schweighardt, Balázs Vehovszky, Dániel Feszty Audi Hungaria Faculty of Automotive Engineering, Department of Whole Vehicle Engineering, Széchenyi István University. ![]()
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